1.Severity of non-alcoholic fatty liver disease is a risk factor for developing hypertension from prehypertension.
Qirui SONG ; Qianhui LING ; Luyun FAN ; Yue DENG ; Qiannan GAO ; Ruixue YANG ; Shuohua CHEN ; Shouling WU ; Jun CAI
Chinese Medical Journal 2023;136(13):1591-1597
		                        		
		                        			BACKGROUND:
		                        			There is little published evidence about the role of non-alcoholic fatty liver disease (NAFLD) in the progression from prehypertension to hypertension. This study was conducted to investigate the association of NAFLD and its severity with the risk of hypertension developing from prehypertension.
		                        		
		                        			METHODS:
		                        			The study cohort comprised 25,433 participants from the Kailuan study with prehypertension at baseline; those with excessive alcohol consumption and other liver diseases were excluded. NAFLD was diagnosed by ultrasonography and stratified as mild, moderate, or severe. Univariable and multivariable Cox proportional hazard regression was used to calculate the hazard ratios (HRs) and 95% confidence intervals (CIs) of incident hypertension according to the presence and 3 categories of severity of NAFLD.
		                        		
		                        			RESULTS:
		                        			During a median of 12.6 years of follow-up, 10,638 participants progressed to hypertension from prehypertension. After adjusting for multiple risk factors, patients with prehypertension and NAFLD had a 15% higher risk of incident hypertension than those without NAFLD (HR = 1.15, 95% CI 1.10-1.21). Moreover, the severity of NAFLD was associated with the incidence of hypertension, which was higher in patients with more severe NAFLD (HR = 1.15 [95% CI 1.10-1.21] in the mild NAFLD group; HR = 1.15 [95% CI 1.07-1.24] in the moderate NAFLD group; and HR = 1.20 [95% CI 1.03-1.41] in the severe NAFLD group). Subgroup analysis indicated that age and baseline systolic blood pressure may modify this association.
		                        		
		                        			CONCLUSIONS
		                        			NAFLD is an independent risk factor for hypertension in patients with prehypertension. The risk of incident hypertension increases with the severity of NAFLD.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Non-alcoholic Fatty Liver Disease/complications*
		                        			;
		                        		
		                        			Prehypertension/diagnosis*
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Hypertension
		                        			;
		                        		
		                        			Incidence
		                        			
		                        		
		                        	
2.The role of inflammation in heart failure with preserved ejection fraction.
Qi ZHANG ; Yun-Er CHEN ; Xin-Xin ZHU ; Xia WANG ; Ai-Juan QU
Acta Physiologica Sinica 2023;75(3):390-402
		                        		
		                        			
		                        			Heart failure with preserved ejection fraction (HFpEF) is a type of heart failure characterized by left ventricular diastolic dysfunction with preserved ejection fraction. With the aging of the population and the increasing prevalence of metabolic diseases, such as hypertension, obesity and diabetes, the prevalence of HFpEF is increasing. Compared with heart failure with reduced ejection fraction (HFrEF), conventional anti-heart failure drugs failed to reduce the mortality in HFpEF due to the complex pathophysiological mechanism and multiple comorbidities of HFpEF. It is known that the main changes of cardiac structure of in HFpEF are cardiac hypertrophy, myocardial fibrosis and left ventricular hypertrophy, and HFpEF is commonly associated with obesity, diabetes, hypertension, renal dysfunction and other diseases, but how these comorbidities cause structural and functional damage to the heart is not completely clear. Recent studies have shown that immune inflammatory response plays a vital role in the progression of HFpEF. This review focuses on the latest research progress in the role of inflammation in the process of HFpEF and the potential application of anti-inflammatory therapy in HFpEF, hoping to provide new research ideas and theoretical basis for the clinical prevention and treatment in HFpEF.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Heart Failure
		                        			;
		                        		
		                        			Stroke Volume/physiology*
		                        			;
		                        		
		                        			Hypertrophy, Left Ventricular/metabolism*
		                        			;
		                        		
		                        			Ventricular Dysfunction, Left/metabolism*
		                        			;
		                        		
		                        			Inflammation/complications*
		                        			;
		                        		
		                        			Obesity
		                        			;
		                        		
		                        			Hypertension
		                        			
		                        		
		                        	
3.Associations Between Insulin Resistance Indexes and Hyperuricemia in Hypertensive Population.
Fang XIONG ; Chao YU ; Ling-Juan ZHU ; Tao WANG ; Wei ZHOU ; Hui-Hui BAO ; Xiao-Shu CHENG
Acta Academiae Medicinae Sinicae 2023;45(3):390-398
		                        		
		                        			
		                        			Objective To explore the relationship between insulin resistance (IR) indexes and hyperuricemia (HUA) among the people with hypertension. Methods From July to August in 2018,hypertension screening was carried out in Wuyuan county,Jiangxi province,and the data were collected through questionnaire survey,physical measurement,and biochemical test.Logistic regression was performed to analyze the relationship between HUA and IR indexes including metabolic score for IR (METS-IR),triglyceride-glucose (TyG) index,TyG-body mass index (BMI),TyG-waist circumference (WC),visceral adiposity index (VAI),triglyceride (TG)/high-density lipoprotein cholesterol (HDL-C),and lipid accumulation product (LAP).The penalty spline method was used for the curve fitting between IR indexes and HUA.The area under the receiver operating characteristic curve (AUC) was employed to reveal the correlation between each index and HUA. Results The 14 220 hypertension patients included 6 713 males and 7 507 females,with the average age of (63.8±9.4) years old,the average uric acid level of (418.9±120.6) mmol/L,and the HUA detection rate of 44.4%.The HUA group had higher proportions of males,current drinking,current smoking,diabetes,and using antihypertensive drugs,older age,higher diastolic blood pressure,WC,BMI,homocysteine,total cholesterol,TG,low-density lipoprotein cholesterol,blood urea nitrogen,creatinine,aspartate aminotransferase,alanine aminotransferase,total protein,albumin,total bilirubin,direct bilirubin, METS-IR, TyG, TyG-BMI, TyG-WC, VAI, TG/HDL-C, and LAP, and lower systolic blood pressure and HDL-C than the normal uric acid group (all P<0.05).Multivariate Logistic regression showed that METS-IR (OR=1.049,95%CI=1.038-1.060, P<0.001), TyG (OR=1.639,95%CI=1.496-1.797, P<0.001), TyG-BMI (OR=1.008,95%CI=1.006-1.010, P<0.001), TyG-WC (OR=1.003,95%CI=1.002-1.004, P<0.001), lnVAI (OR=1.850, 95%CI=1.735-1.973, P<0.001), ln(TG/HDL-C) (OR=1.862,95%CI=1.692-2.048, P<0.001),and lnLAP (OR=1.503,95%CI=1.401-1.613,P<0.001) were associated with the risk of HUA.Curve fitting indicated that METS-IR,TyG,TYG-BMI,TYG-WC,lnVAI,ln(TG/HDL-C),and lnLAP were positively correlated with HUA (all P<0.001),and the AUC of TyG index was higher than that of other IR indexes (all P<0.05). Conclusion Increased IR indexes,especially TyG,were associated with the risk of HUA among people with hypertension.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Insulin Resistance
		                        			;
		                        		
		                        			Hyperuricemia
		                        			;
		                        		
		                        			Uric Acid
		                        			;
		                        		
		                        			Hypertension/complications*
		                        			;
		                        		
		                        			Glucose
		                        			;
		                        		
		                        			Obesity, Abdominal/epidemiology*
		                        			;
		                        		
		                        			Triglycerides
		                        			;
		                        		
		                        			Bilirubin
		                        			;
		                        		
		                        			Cholesterol
		                        			;
		                        		
		                        			Blood Glucose/metabolism*
		                        			
		                        		
		                        	
4.Advances in Medical Treatment of Primary Aldosteronism.
Ying-Jie LI ; Zhi-Gang JI ; Jin WEN
Chinese Medical Sciences Journal 2023;38(1):49-56
		                        		
		                        			
		                        			Primary aldosteronism (PA) is the most common form of secondary hypertension, with its main manifestations including hypertension and hypokalemia. Early identification of PA is extremely important as PA patients can easily develop cardiovascular complications such as atrial fibrillation, stroke, and myocardial infarction. The past decade has witnessed the rapid advances in the genetics of PA, which has shed new light on PA treatment. While surgery is the first choice for unilateral diseases, bilateral lesions can be treated with mineralocorticoid receptor antagonists (MRAs). The next-generation non-steroidal MRAs are under investigations. New medications including calcium channel blockers, macrophage antibiotics, and aldosterone synthase inhibitors have provided a new perspective for the medical treatment of PA.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Hyperaldosteronism/complications*
		                        			;
		                        		
		                        			Adrenalectomy/adverse effects*
		                        			;
		                        		
		                        			Aldosterone/therapeutic use*
		                        			;
		                        		
		                        			Hypertension/drug therapy*
		                        			;
		                        		
		                        			Mineralocorticoid Receptor Antagonists/therapeutic use*
		                        			
		                        		
		                        	
5.Recent Research Advance to Differentiate Portal Hypertension Associated with Primary Myelofibrosis and Cirrhosis --Review.
Rui LI ; Hua-Sheng LIU ; Ying CHEN
Journal of Experimental Hematology 2023;31(2):598-601
		                        		
		                        			
		                        			Primary myelofibrosis (PMF) is easily confused with cirrhosis, due to its main clinical manifestations of splenomegaly and the blood cytopenia. This review focuses on clinical studies to identify primary myelofibrosis and cirrhosis related portal hypertension, to analyze the differences between the two diseases, in order to distinguish PMF and cirrhosis from the pathogenesis, clinical manifestations, laboratory examinations and treatment principles, and simultaneously improve clinicians' understanding of PMF, which is a reference for exploring the early screening or diagnostic indicators of PMF, also provides a clinical basis for the application of new targeted drugs such as ruxolitinib.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Primary Myelofibrosis/drug therapy*
		                        			;
		                        		
		                        			Hypertension, Portal/complications*
		                        			;
		                        		
		                        			Liver Cirrhosis/pathology*
		                        			;
		                        		
		                        			Splenomegaly/pathology*
		                        			;
		                        		
		                        			Anemia
		                        			
		                        		
		                        	
6.Expression of LRG-1 in mice with hypertensive renal damage and its significance.
Linlin ZHANG ; Xiangcheng XIAO ; Xueling HU ; Wei WANG ; Ling PENG ; Rong TANG
Journal of Central South University(Medical Sciences) 2023;48(6):837-845
		                        		
		                        			OBJECTIVES:
		                        			Long-term elevated blood pressure may lead to kidney damage, yet the pathogenesis of hypertensive kidney damage is still unclear. This study aims to explore the role and significance of leucine-rich alpha-2-glycoprotein-1 (LRG-1) in hypertensive renal damage through detecting the levels of LRG-1 in the serum and kidney of mice with hypertensive renal damage and its relationship with related indexes.
		                        		
		                        			METHODS:
		                        			C57BL/6 mice were used in this study and randomly divided into a control group, an angiotensin II (Ang II) group, and an Ang II+irbesartan group. The control group was gavaged with physiological saline. The Ang II group was pumped subcutaneously at a rate of 1.5 mg/(kg·d) for 28 days to establish the hypertensive renal damage model in mice, and then gavaged with equivalent physiological saline. The Ang II+irbesartan group used the same method to establish the hypertensive renal damage model, and then was gavaged with irbesartan. Immunohistochemistry and Western blotting were used to detect the expression of LRG-1 and fibrosis-related indicators (collagen I and fibronectin) in renal tissues. ELISA was used to evaluate the level of serum LRG-1 and inflammatory cytokines in mice. The urinary protein-creatinine ratio and renal function were determined, and correlation analysis was conducted.
		                        		
		                        			RESULTS:
		                        			Compared with the control group, the levels of serum LRG-1, the expression of LRG-1 protein, collagen I, and fibronectin in kidney in the Ang II group were increased (all P<0.01). After treating with irbesartan, renal damage of hypertensive mice was alleviated, while the levels of LRG-1 in serum and kidney were decreased, and the expression of collagen I and fibronectin was down-regulated (all P<0.01). Correlation analysis showed that the level of serum LRG-1 was positively correlated with urinary protein-creatinine ratio, blood urea nitrogen, and blood creatinine level in hypertensive kidney damage mice. Serum level of LRG-1 was also positively correlated with serum inflammatory factors including TNF-α, IL-1β, and IL-6.
		                        		
		                        			CONCLUSIONS
		                        			Hypertensive renal damage mice display elevated expression of LRG-1 in serum and kidney, and irbesartan can reduce the expression of LRG-1 while alleviating renal damage. The level of serum LRG-1 is positively correlated with the degree of hypertensive renal damage, suggesting that it may participate in the occurrence and development of hypertensive renal damage.
		                        		
		                        		
		                        		
		                        			Animals
		                        			;
		                        		
		                        			Mice
		                        			;
		                        		
		                        			Mice, Inbred C57BL
		                        			;
		                        		
		                        			Fibronectins
		                        			;
		                        		
		                        			Irbesartan
		                        			;
		                        		
		                        			Creatinine
		                        			;
		                        		
		                        			Kidney/physiology*
		                        			;
		                        		
		                        			Hypertension/complications*
		                        			;
		                        		
		                        			Angiotensin II
		                        			;
		                        		
		                        			Collagen Type I
		                        			
		                        		
		                        	
7.Correlation between left atrial strain and left ventricular diastolic function in hypertensive patients.
Jin CAI ; Zhongshu LIANG ; Wenchang FENG ; Hui LONG
Journal of Central South University(Medical Sciences) 2023;48(6):846-851
		                        		
		                        			OBJECTIVES:
		                        			Early detection of asymptomatic diastolic dysfunction is essential to prevent the development of heart failure in hypertensive patients. Current studies suggest that left atrial strain contributes to the evaluation of left ventricular diastolic function, but there are fewer studies on the correlation between left atrial strain and diastolic function in hypertensive patients. In this study, we applied a two-dimensional speckle tracking technique to evaluate the changes in left atrial strain in hypertensive patients, and to investigate the relationship between left atrial strain and left ventricular diastolic function.
		                        		
		                        			METHODS:
		                        			A total of 82 hypertensive patients who were visited the Department of Cardiology at the Third Xiangya Hospital of Central South University from July 2021 to January 2022, were enrolled for this study, and 59 healthy subjects served as a control group. According to the number of left ventricular diastolic function indexes recommended by the 2016 American Society of Echocardiography Diastolic Function Guidelines (mitral annular e´ velocity: Septal e´<7 cm/s, lateral e´<10 cm/s, E/e´ ratio>14, left atrial volume index>34 mL/m2, peak tricuspid regurgitation velocity>2.8 m/s), the hypertensive patients were divided into 3 groups: Group Ⅰ (0 index, n=36 ), Group Ⅱ (1 index, n=39), and Group Ⅲ (2 indexes, n=7). Two-dimensional speckle tracking technique was used to measure left atrial reservoir strain (LASr), conduit strain, and contraction strain, and to analyze the correlation between left atrial strain and left ventricular diastolic function in hypertensive patients.
		                        		
		                        			RESULTS:
		                        			The LASr, left atrial conduit strain (LAScd), and LASr/(E/septal e´) of the hypertension group were lower than those of the control group, and E/LASr was higher than that of the control group. There was no significant difference in left atrium volume index between the 2 groups (P>0.05). Compared with Group Ⅰ, LASr, LAScd, and LASr/(E/septal e´) were decreased in Group Ⅱ and Group Ⅲ, LASr/(E/septal e´) was also decreased in Group Ⅲ compared with Group Ⅱ (all P<0.05). Compared with Group Ⅰ, E/LASr was increased in Group Ⅲ. LASr was positively correlated with septal e´, lateral e´, E, and E/A, and negatively correlated with E/septal e´.
		                        		
		                        			CONCLUSIONS
		                        			The changes of left atrial function in patients with early hypertension are earlier than those of left atrial structure. Left atrial strain and its combination with conventional ultrasonographic indices [LASr/(E/septal e´)] of diastolic function are potentially useful in assessing left ventricular diastolic function in hypertensive patients.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Atrial Fibrillation
		                        			;
		                        		
		                        			Atrial Appendage
		                        			;
		                        		
		                        			Heart Atria/diagnostic imaging*
		                        			;
		                        		
		                        			Hypertension/complications*
		                        			;
		                        		
		                        			Diastole
		                        			
		                        		
		                        	
8.Outcome of surgical repair for aortic coarctation with coexisting descending aortic aneurysm in adult patients.
Yi Fan LU ; Huan Yu QIAO ; Bo YANG ; Hong Lei ZHAO ; Hao ZHANG ; Tao BAI ; Jin Rong XUE ; Yong Min LIU
Chinese Journal of Cardiology 2023;51(5):469-475
		                        		
		                        			
		                        			Objective: To evaluate the efficacy of surgical treatment of aortic coarctation combined with descending aortic aneurysm in adult patients. Methods: This is a retrospective cohort study. Adult patients with aortic coarctation who were hospitalized in Beijing Anzhen Hospital from January 2015 to April 2019 were enrolled. The aortic coarctation was diagnosed by aortic CT angiography, and the included patients were divided into the combined descending aortic aneurysm group and the uncomplicated descending aortic aneurysm group based on descending aortic diameter. General clinical data and surgery-related data were collected from the included patients, and death and complications were recorded at 30 days after surgery, and upper limb systolic blood pressure was measured in all patients at discharge. Patients were followed up after discharge by outpatient visit or telephone call for their survival and the occurrence of repeat interventions and adverse events, which included death, cerebrovascular events, transient ischemic attack, myocardial infarction, hypertension, postoperative restenosis, and other cardiovascular-related interventions. Results: A total of 107 patients with aortic coarctation aged (34.1±15.2) years were included, and 68 (63.6%) were males. There were 16 cases in the combined descending aortic aneurysm group and 91 cases in the uncomplicated descending aortic aneurysm group. In the combined descending aortic aneurysm group, 6 cases (6/16) underwent artificial vessel bypass, 4 cases (4/16) underwent thoracic aortic artificial vessel replacement, 4 cases (4/16) underwent aortic arch replacement+elephant trunk procedure, and 2 cases (2/16) underwent thoracic endovascular aneurysm repair. There was no statistically significant difference between the two groups in the choice of surgical approach (all P>0.05). In the combined descending aortic aneurysm group at 30 days after surgery, one case underwent re-thoracotomy surgery, one case developed incomplete paraplegia of the lower extremity, and one case died; and the differences in the incidence of endpoint events at 30 days after surgery were similar between the two groups (P>0.05). Systolic blood pressure in the upper extremity at discharge was significantly lower in both groups compared with the preoperative period (in the combined descending aortic aneurysm group: (127.3±16.3) mmHg vs. (140.9±16.3) mmHg, P=0.030, 1 mmHg=0.133 kPa; in the uncomplicated descending aortic aneurysm group: (120.7±13.2) mmHg vs. (151.8±26.3) mmHg, P=0.001). The follow-up time was 3.5 (3.1, 4.4) years. There were no new deaths in the combined descending aortic aneurysm group, no transient ischemic attack, myocardial infarction or re-thoracotomy surgery, and one patient (1/15) suffered cerebral infarction and 10 patients (10/15) were diagnosed with hypertension. The differences in the occurrence of endpoint events during postoperative follow-up were similar between the two groups (P>0.05). Conclusion: In experienced centers, long-term prognosis of patients with aortic coarctation combined with descending aortic aneurysm is satisfactory post surgical intervention.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Aortic Coarctation/surgery*
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Aortic Aneurysm, Abdominal/surgery*
		                        			;
		                        		
		                        			Treatment Outcome
		                        			;
		                        		
		                        			Blood Vessel Prosthesis Implantation/adverse effects*
		                        			;
		                        		
		                        			Endovascular Procedures/adverse effects*
		                        			;
		                        		
		                        			Hypertension/complications*
		                        			;
		                        		
		                        			Myocardial Infarction/complications*
		                        			;
		                        		
		                        			Aortic Aneurysm, Thoracic/surgery*
		                        			
		                        		
		                        	
9.Study on related factors and characteristics of multimorbidity of overweight and obesity-related diseases in children in Hunan Province.
Zhen Zhen YAO ; Jun Xia YAN ; Ning An XU ; Ru Tong KANG ; Xiong Wei LI ; Hai Xiang ZHOU ; Wen DAI ; Si S OUYANG ; Yi Xu LIU ; Jia You LUO ; Yan ZHONG
Chinese Journal of Preventive Medicine 2023;57(5):747-752
		                        		
		                        			
		                        			From January 2019 to December 2021, overweight and obese children who visited in health outpatient Center of Hunan Children's Hospital were studied to explore and analyze the rate, related factors and patterns of multimorbidity of overweight and obesity-related diseases in children in Hunan Province. Univariate and multivariate logistic regression models were used to analyze the multimorbidity-related factors of overweight and obesity-related diseases in children. Association rules (apriori algorithm) were used to explore the multimorbidity patterns of overweight and obesity-related diseases in children. A total of 725 overweight and obese children were included in this study. The multimorbidity rate of overweight and obesity-related diseases in children was 46.07% (334/725). Age, waist circumference, the frequency of food consumption such as hamburgers and fries and adding meals before bedtime were multimorbidity-related factors of overweight and obesity-related diseases in children. The multimorbidity associated with nonalcoholic fatty liver disease (NAFLD) was relatively common. The patterns with the top three support degrees were "NAFLD+dyslipidemia","NAFLD+hypertension" and "NAFLD+hyperuricemia". The patterns with the top three confidence and elevation degrees were "Hypertension+dyslipidemia => NAFLD","Hyperuricemia => NAFLD" and "NAFLD+hypertension => dyslipidemia".
		                        		
		                        		
		                        		
		                        			Child
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Overweight/complications*
		                        			;
		                        		
		                        			Non-alcoholic Fatty Liver Disease
		                        			;
		                        		
		                        			Pediatric Obesity/epidemiology*
		                        			;
		                        		
		                        			Hyperuricemia
		                        			;
		                        		
		                        			Multimorbidity
		                        			;
		                        		
		                        			Hypertension/epidemiology*
		                        			;
		                        		
		                        			Dyslipidemias
		                        			;
		                        		
		                        			Body Mass Index
		                        			;
		                        		
		                        			Risk Factors
		                        			
		                        		
		                        	
10.Risk factors related to coronary artery occlusion in female patients with ischemic angina pectoris.
Cheng Fei PENG ; Ya Song WANG ; Ya Ling HAN ; Xiao Zeng WANG
Chinese Journal of Cardiology 2023;51(2):158-163
		                        		
		                        			
		                        			Objective: To analyze the risk factors of coronary artery occlusion in female patients with ischemic angina pectoris. Methods: Clinical data of 1 600 patients (666 females and 934 males) who underwent coronary angiography from January 2013 to December 2015 due to angina pectoris in 6 major coronary intervention centers in China were retrospectively analyzed. The clinical characteristics were compared between the female and male groups, and between the non-obstructive coronary artery disease (INOCA) and ischemic obstructive coronary artery disease (IOCA) subgroups of female subjects with angina pectoris. The risk factors related to the degree of coronary artery occlusion in female patients were analyzed. Results: In the enrolled patients who underwent coronary angiography for angina pectoris, female group was older than the male group, and the proportion of patients with hypertension, diabetes and ischemia accompanied by IOCA was significantly higher than that of the male group (P<0.05). Univariate analysis showed that age≥65 years, hypertension, diabetes, and typical angina symptoms were associated with an increased risk of IOCA in female patients with angina pectoris. Multivariate regression analysis showed that age≥65 years old (OR=1.784, 95%CI: 1.146-2.776, P=0.010), hypertension (OR=1.782, 95%CI: 1.201-2.644, P=0.004) and typical angina symptoms (OR=1.642, 95%CI: 1.127-2.393, P=0.010) were independent risk factors for female patients with angina pectoris diagnosed as IOCA. The correlation analysis between the number of risk factors and the type of coronary artery disease obstruction showed that the incidence of INOCA decreased significantly with the increase of the number of risk factors, from 45.5% to 14.2%. The incidence of IOCA increased significantly with the number of risk factors, from 54.5% to 85.8% (P for trend<0.001). Conclusion: The incidence of INOCA in female patients with angina pectoris suspected of coronary heart disease is higher than that of male. The incidence of IOCA increased significantly, and the incidence of INOCA decreased significantly in proportion to the increase of the number of combined risk factors.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Coronary Artery Disease/complications*
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Angina Pectoris/epidemiology*
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Coronary Angiography
		                        			;
		                        		
		                        			Hypertension/complications*
		                        			;
		                        		
		                        			Coronary Occlusion/complications*
		                        			;
		                        		
		                        			Ischemia/complications*
		                        			
		                        		
		                        	
            
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