1.Risk factors of postoperative stroke in elderly patients with hip fracture.
China Journal of Orthopaedics and Traumatology 2022;35(4):337-341
OBJECTIVE:
To study the risk factors of stroke after of elderly patients with hip fracture after operation.
METHODS:
From March 2012 to June 2017, 500 elderly patients with hip fracture who underwent hip replacement were selected, including 286 males and 214 females, aged from 60 to 76 years old with an average of (68.49±11.85) years. They were divided into stroke group with 30 cases and control group with 470 cases according to the occurrence of acute stroke within two weeks after operation. The general data and serum contents of cytokines IL-1, IL-6, IL-10 and TNF-α were compared between the two groups. The overall survival of the two groups were followed up.
RESULTS:
There was no significant difference in sex, age, anesthesia method, operation time, intraoperative blood loss, preoperative IL-1, IL-6, IL-10 and TNF-α contenta between stroke group and control group(P>0.05). The prevalence of hypertension, diabetes mellitus, atrial fibrillation, intraoperative hypotension, IL-1, IL-6, IL-10 and TNF-α contenta 1 day and 3 days after operation of stroke group were significantly higher than control group(P<0.05);up to the date of follow-up, the cumulative survival rate of stroke patients were significantly lower than those of the control group(P<0.05). Logistic regression analysis showed that intraoperative hypotension, elevated contents of serum IL-1 and TNF-α at 1 and 3 days after operation were risk factors for acute stroke.
CONCLUSION
Postoperative stroke in elderly patients with hip fracture affects the prognosis of the disease. The increase of inflammatory cytokines IL-1 and TNF-α after operation is an independent risk factor for stroke.
Aged
;
Cytokines
;
Female
;
Hip Fractures/surgery*
;
Humans
;
Hypotension
;
Interleukin-1
;
Interleukin-10
;
Interleukin-6
;
Male
;
Middle Aged
;
Risk Factors
;
Stroke/etiology*
;
Tumor Necrosis Factor-alpha
2.Risk factor analysis on body mass rebound after laparoscopic sleeve gastrectomy and establishment of a nomogram prediction model.
Jie ZHAO ; Yu Wen JIAO ; Jun QIAN ; Zhi Fen QIAN ; Hao Jun YANG ; Li Ming TANG
Chinese Journal of Gastrointestinal Surgery 2022;25(10):913-920
Objective: To investigate the potential independent risk factors of body mass rebound following laparoscopic sleeve gastrectomy (LSG) and construct a nomogram prediction model based on these factors. Methods: In this retrospective observational study, patients with obesity who had undergone LSG at the Department of Gastrointestinal Surgery of the Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University between January 2015 and July 2017 were retrospectively enrolled. These patients were divided according to their status of postoperative body mass rebound. The inclusion criteria were patients aged between 16 and 65 years who had undergone LSG bariatric surgery with surgical indications according to the 2014 Chinese Guidelines for the Surgical Management of Obesity and Type 2 Diabetes Mellitus. The exclusion criteria were patients who had undergone other bariatric surgeries, who were taking weight-loss drugs or drugs that affected their body weight, who had severe gastroesophageal reflux and hiatal hernia, who were pregnant, who had incomplete clinical data, and who were lost to follow-up or were followed up for <3 years. In total, 241 patients with obesity (69 males and 172 females) who had undergone LSG surgery were enrolled. The mean age and body mass index (BMI) were (29.9±5.8) years and (40.8±4.8) kg/m2, respectively. The patients were followed up till July 2022, with a focus on their body weight. Postoperative body mass rebound was defined as a percentage increase of ≥10% from the nadir body mass, which was the lowest body mass during the 3-year follow-up period. The body weight rebound following LSG and its influencing factors were observed, based on which a nomogram model was constructed and evaluated. The relationships between the patients' basic data, clinical indicators, preoperative hematological indicators, postoperative indicators, and body weight rebound following LSG were analyzed via univariate analysis. Independent risk factors were further screened by multivariate logistic regression analysis. Factors with a statistically significant difference were included into the nomogram prediction model. Moreover, the model was internally (modeling set) and externally (validation set, 80 baseline data-matched patients with obesity from our center) validated using receiver operating characteristic (ROC) curve, calibration curve, and decision curve analysis (DCA) via R software. ROC curve analysis was used to analyze the predictive and cutoff values of the measurement data for body mass rebound. Results: Overall, 90 patients (37.3%) exhibited postoperative body weight rebound, with the lowest BMI of (29.5±2.6) kg/m2 and time to reach the lowest BMI of (15.4±2.3) months; 151 patients (62.7%) did not exhibit body weight rebound, with the lowest BMI of (29.8±2.3) kg/m2 and time to reach the lowest BMI of (14.7±2.1) months. The results of univariate analysis showed that BMI, depression, anxiety, C-reactive protein (CRP) levels, systemic immune inflammatory index (SII), prognostic nutritional index (PNI), and albumin/fibrinogen ratio (AFR) were associated with body weight rebound following LSG with statistically significant differences (all P<0.05). The results of multivariate regression analyses suggested that depression [odds ration (OR) = 1.31, 95% confidence interval (CI): 1.08-1.62, P=0.010], preoperative CRP levels of ≥8 mg/L (OR = 1.34, 95% CI: 1.09-1.69, P=0.007), SII (OR = 0.58, 95% CI: 0.41-0.86, P=0.013), PNI (OR = 2.06, 95% CI: 1.03-4.21, P=0.007), and AFR (OR: 0.49, 95% CI: 0.33-0.69, P=0.011) were five independent risk factors for body mass rebound. A nomogram prediction model was constructed based on the multivariate analysis results. The scores of PNI, SII, AFR, CRP, and depression were 92.5, 100, 72.5, 25, and 27.5, respectively. The total score was calculated by adding the individual scores of each risk factor, which was used to calculate the probability of body mass rebound following LSG. The evaluation results of the nomogram model showed a C-index of 0.713 and 0.762, sensitivity of 0.656 and 0.594, and specificity of 0.715 and 0.909 in the modeling and validation sets, respectively. The calibration curve analysis and DCA indicated that the nomogram model has a good predictive value for body mass rebound after LSG. Conclusion: Preoperative depression, CRP of ≥8 mg/L, SII, PNI, and AFR were independent risk factors for body mass rebound following LSG. Hence, the nomogram prediction model based on these factors can effectively predict body mass rebound in patients undergoing LSG.
Adolescent
;
Adult
;
Aged
;
Anti-Obesity Agents
;
C-Reactive Protein
;
Diabetes Mellitus, Type 2
;
Factor Analysis, Statistical
;
Female
;
Fibrinogen
;
Gastrectomy/methods*
;
Humans
;
Laparoscopy/methods*
;
Male
;
Middle Aged
;
Nomograms
;
Obesity
;
Retrospective Studies
;
Risk Factors
;
Weight Loss
;
Young Adult
3.Clinical characteristics of patients with rheumatoid arthritis complicated with venous thrombosis of lower extremities.
Rui LIU ; Jin Xia ZHAO ; Liang YAN
Journal of Peking University(Health Sciences) 2022;54(6):1079-1085
OBJECTIVE:
To analyze the clinical characteristics of patients with rheumatoid arthritis (RA) complicated with venous thrombosis of lower extremities, and to improve the awareness of this condition.
METHODS:
The clinical and laboratory data of 502 RA patients hospitalized in Department of Rheumatology and Immunology Peking University Third Hospital from November 1, 2013 to December 31, 2020 were collected, retrospective analysis was made on the RA patients who were diagnosed with lower limb vein thrombosis on discharge but hadn't on admission, the patients in this group were defined as thrombosis group, and the other patients without lower limb vein thrombosis were taken as control group. Single factor analysis was conducted between the two groups. Then multivariate Logistic regression analysis was used to analyze the independent risk factors of RA complicated with lower limb venous thrombosis with statistical significance in univariate analysis.
RESULTS:
There were 34 patients (6.77%) in the thrombosis group and 468 patients (93.23%) in the control group. The age of thrombosis group was 34-86 years (median age was 71 years); 23 were female and 11 were male; there were 20 cases with unilateral lower limb vein thrombosis and 14 cases with bilateral lower limb vein thrombosis; pulmonary embolism in 3 cases (low risk).In the thrombosis group 17 (50.0%) patients were bedridden for more than one week or needed crutches/wheelchairs before admission. 29 cases(85.3%)had large joint involvement of lower extremities, including 22 cases of knee joint involvement, 1 case of hip joint involvement, 2 cases of ankle joint involvement, and 4 cases with both knee and hip joint involvement. In the thrombosis group, the high, middle and low disease activity scores 28(DAS28) were 23 (67.6%), 9 (26.5%) and 2 (5.9%), respectively. There were 21 patients in the thrombosis group had completed thrombosis related examinations, only 4 patients were positive for anti-cardiolipin antibody or anti-β2 glycoprotein 1 antibody or lupus anticoagulant, the rests were all negative. In the thrombosis group, age and platelet (PLT) level were significantly higher than those in the control group [71 (60, 77) years vs. 60 (51, 68) years, Z=-3.873, P < 0.01, (328.53× 109±119.06 × 109) /L vs.(278.68 × 109±104.50 × 109)/L, t=2.660, P < 0.01, respectively]. The proportion of D-Dimer increased in the thrombosis group as well as the positivity rheumatoid factor (RF) was much higher than those in the control group (94.1% vs.66.4%, χ2=11.192, P < 0.01; 85.3% vs.67.1%, χ2=4.852, P < 0.05, respectively). Multivariate Logistic regression analysis showed that age (OR=1.063, 95%CI: 1.026-1.101, P=0.001), D-Dimer increased (OR=4.968, 95%CI: 1.136-21.730, P=0.033) and PLT level (OR=1.004, 95%CI: 1.001-1.007, P=0.022) were the independent risk factors for RA complica-ted with lower extremity venous thrombosis.
CONCLUSION
RA patients have potential risk of thrombosis of lower extremities. For the older age, D-Dimer and PLT elevated, especially those who were bedridden, RF positive and had high disease activity, should be alert to the risk.
Humans
;
Male
;
Female
;
Aged
;
Adult
;
Middle Aged
;
Aged, 80 and over
;
Retrospective Studies
;
Rheumatoid Factor
;
Venous Thrombosis/complications*
;
Arthritis, Rheumatoid/complications*
;
Lower Extremity
;
Risk Factors
;
Thrombosis
4.Risk factors for recurrence after intravitreal anti-vascular endothelial growth factor injection for retinopathy of prematurity.
Qing-Fei HAO ; Jing CHEN ; Peng RUAN ; Gao-Pan LI ; Jing ZHANG ; Hao-Ming CHEN ; Hong-Xiang GUO ; Xiao-Juan SUN ; Xiu-Yong CHENG
Chinese Journal of Contemporary Pediatrics 2022;24(11):1207-1212
OBJECTIVES:
To investigate the efficacy of intravitreal anti-vascular endothelial growth factor (anti-VEGF) injection in the treatment of retinopathy of prematurity (ROP) and the risk factors for recurrence.
METHODS:
A retrospective analysis was performed on the medical data of 159 infants with ROP who were born in the First Affiliated Hospital of Zhengzhou University and underwent anti-VEGF treatment from January 2016 to December 2021. According to the presence or absence of recurrence within the follow-up period after initial anti-VEGF treatment, they were divided into a recurrence group with 24 infants and a non-recurrence group with 135 infants. The medical data were compared between the two groups, and a multivariate logistic regression analysis was used to investigate the risk factors for the recurrence of ROP after anti-VEGF treatment.
RESULTS:
After one-time anti-VEGF treatment, all 159 infants showed regression of plus disease. Recurrence was observed in 24 infants (15.1%) after anti-VEGF treatment, with a mean interval of (8.4±2.6) weeks from treatment to recurrence. The multivariate logistic regression analysis showed that preoperative fundus hemorrhage and prolonged total oxygen supply time were risk factors for the recurrence of ROP (P<0.05), while gestational hypertension was a protective factor (P<0.05).
CONCLUSIONS
Intravitreal anti-VEGF injection is effective for ROP. Preoperative fundus hemorrhage and long duration of oxygen therapy may increase the risk of ROP recurrence, and further studies are needed to investigate the influence of gestational hypertension on the recurrence of ROP.
Female
;
Humans
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Infant
;
Infant, Newborn
;
Pregnancy
;
Angiogenesis Inhibitors/therapeutic use*
;
Endothelial Growth Factors/therapeutic use*
;
Hemorrhage
;
Hypertension, Pregnancy-Induced
;
Oxygen/therapeutic use*
;
Retinopathy of Prematurity/drug therapy*
;
Retrospective Studies
;
Risk Factors
;
Vascular Endothelial Growth Factor A
5.Risk factors for neutropenia of late newborns.
Li LI ; Bo YANG ; Xiang-Yu GAO ; Yi REN ; Min SU ; Chun-Yan YANG ; Di HUANG ; Hui-Ying WANG
Chinese Journal of Contemporary Pediatrics 2021;23(4):375-380
OBJECTIVE:
To study the risk factors and treatment for neutropenia of late newborns (NLN).
METHODS:
Related clinical data were collected from the preterm infants and critically ill neonates who were admitted to the neonatal intensive care unit from July 2019 to January 2020. A total of 46 newborns with a blood absolute neutrophil count (ANC) of < 1.5×10
RESULTS:
Among the 46 neonates in the NLN group, 29 had a gestational age of < 32 weeks, 14 had a gestational age of 32-37 weeks, and 3 had a gestational age of > 37 weeks. There was no significant difference between the two groups in the incidence rates of gestational hypertension, premature rupture of membranes > 18 hours and intrauterine distress, 5-minute Apgar score, the duration of positive pressure ventilation, the incidence rate of early-onset sepsis, and the type of initially used antibiotics (
CONCLUSIONS
The risk of NLN increases with the presence of late-onset sepsis and the increase in the duration of antibiotic use. NLN is generally a benign process. G-CSF appears to be safe and effective for NLN with severe disease conditions or severe reduction in ANC.
Granulocyte Colony-Stimulating Factor
;
Humans
;
Infant
;
Infant, Newborn
;
Infant, Premature
;
Leukocyte Count
;
Neutropenia
;
Risk Factors
;
Sepsis
6.Multilevel Analysis of Socio-Demographic Disparities in Adulthood Obesity Across the United States Geographic Regions
Osong Public Health and Research Perspectives 2019;10(3):137-144
OBJECTIVES: The objective of this study was to examine the socio-demographic disparities in obesity among US adults across 130 metropolitan and micropolitan statistical areas. METHODS: This study used data from the 2015 Behavioral Risk Factor Surveillance System and Selected Metropolitan/Micropolitan Area Risk Trend of 159,827 US adults aged 18 years and older. Data were analyzed using the multilevel linear regression models. RESULTS: According to individual level analyses, socio-demographic disparities in obesity exist in the United States. Individuals with low socioeconomic status were associated with a higher body mass index. The participants from the Midwest United States tend to have higher body mass index than those who from the South. According to metropolitan and micropolitan statistical area level analyses, secondly, there were significant differences in obesity status between different areas and the relation of obesity with 5 socio-demographic factors varied across different areas. According to geospatial mapping analyses, even though obesity status by metropolitan and micropolitan statistical area level has improved overtime, differences in body mass index between United States regions are increasing from 2007 to 2015. CONCLUSION: Socio-demographic and regional disparities in obesity status persist among US adults. Hence, these findings underscore the need to take socio-environmental factors into account when planning obesity prevention on vulnerable populations and areas.
Adult
;
Behavioral Risk Factor Surveillance System
;
Body Mass Index
;
Humans
;
Linear Models
;
Multilevel Analysis
;
Obesity
;
Social Class
;
United States
;
Vulnerable Populations
7.Propofol Suppresses LPS-Induced Inflammation in Amnion Cells via Inhibition of NF-κB Activation
Ji Young YOON ; Do Wan KIM ; Ji Hye AHN ; Eun Ji CHOI ; Yeon Ha KIM ; Moonjung JEUN ; Eun Jung KIM
Tissue Engineering and Regenerative Medicine 2019;16(3):301-309
BACKGROUND: Preterm labor is a leading risk factor for neonatal death and long-term impairment and linked closely with inflammation. Non-obstetric surgery is occasionally needed during pregnancy and the anesthetic drugs or surgery itself can give rise to inflammation. Here, we examined the influence of propofol pretreatment on the expression of cyclooxygenase-2 (COX-2) and prostaglandin E2 (PGE2) after lipopolysaccharide (LPS) stimulation. In addition, we evaluated the expression of pro-inflammatory cytokines and nuclear factor kappa B (NF-κB). METHODS: Human amnion-derived WISH cells were used to investigate the effect of propofol on the LPS-induced expression of inflammatory substances involved in preterm labor. For the experiment, WISH cells were pretreated with various concentrations propofol (0.01–10 µg/ml) for 1 h and then treated with LPS (1 µg/ml) for 24 h. Cytotoxicity was evaluated using MTT assay. PGE2 concentration was assessed by ELISA. Protein expressions of COX-2, PGE2 and NF-κB were analyzed by western blotting analysis. RT-PCR was used for analysis of mRNA expression of COX-2, PGE2, interlukin (IL)-1β and tumor necrosis factor (TNF)-α. RESULTS: Propofol showed no cytotoxicity on the WISH cells. LPS-induced PGE2 production and COX-2 and PGE2 expression were decreased after propofol pretreatment. Propofol also attenuated the LPS-induced mRNA expression of IL-1β and TNF-α. Moreover, the activation of NF-jB was inhibited by propofol pretreatment on LPS-stimulated WISH cells. CONCLUSION: We demonstrated that propofol suppresses the expression of inflammatory substances enhanced by LPS stimulation. Furthermore, this inhibitory effect of propofol on the inflammatory substance expression is mediated by suppression of NF-κB activation.
Amnion
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Anesthetics
;
Blotting, Western
;
Cyclooxygenase 2
;
Cytokines
;
Dinoprostone
;
Enzyme-Linked Immunosorbent Assay
;
Female
;
Humans
;
Inflammation
;
NF-kappa B
;
Obstetric Labor, Premature
;
Perinatal Death
;
Pregnancy
;
Propofol
;
Risk Factors
;
RNA, Messenger
;
Tumor Necrosis Factor-alpha
8.An Updated Nomogram for Predicting Invasiveness in Preoperative Ductal Carcinoma In Situ of the Breast
Sanghwa KIM ; Jihong KIM ; Hyung Seok PARK ; Ha Yan KIM ; Kwanbum LEE ; Jeea LEE ; Haemin LEE ; Jee Ye KIM ; Seung Il KIM ; Young Up CHO ; Byeong Woo PARK
Yonsei Medical Journal 2019;60(11):1028-1035
PURPOSE: To validate and update a nomogram for predicting ductal carcinoma in situ (DCIS) upstaging in preoperative biopsy. MATERIALS AND METHODS: Medical records of 444 preoperative DCIS patients were evaluated and used to validate a previous version of the Severance nomogram for predicting DCIS upstaging in preoperative biopsy. Patients were divided into two groups according to the final postoperative pathology. Univariate and multivariate analyses with the chi-square test, Student's t-test, and binary logistic regression method identified new significant variables. The updated nomogram was evaluated with the C-index and Hosmer—Lemeshow goodness of fit test. RESULTS: The area under a receiver operating characteristic curve for comparison with the previous nomogram was 0.48. In postoperative pathology, the pure DCIS and invasive cancer groups comprised 345 and 99 cases, respectively. Approximately 22.3% of patients preoperatively diagnosed with DCIS were upstaged to invasive cancer. Significant variables in the univariate analysis were operation type, human epidermal growth factor receptor 2 overexpression, comedo necrosis, sonographic mass, mammographic mass, preoperative biopsy method, and suspicious microinvasion in preoperative biopsy. In multivariate analysis, operation type, sonographic mass, mammographic mass, and suspicious microinvasion were risk factors for upstaging. The updated model with these variables showed moderate discrimination and was appropriate in the calibration test. CONCLUSION: The previous nomogram did not effectively discriminate upstaging of preoperative DCIS in an independent cohort. An updated version of the nomogram appears to provide more accurate information for predicting preoperative DCIS upstaging.
Biopsy
;
Breast Neoplasms
;
Breast
;
Calibration
;
Carcinoma, Ductal
;
Carcinoma, Intraductal, Noninfiltrating
;
Cohort Studies
;
Discrimination (Psychology)
;
Humans
;
Logistic Models
;
Medical Records
;
Methods
;
Multivariate Analysis
;
Necrosis
;
Nomograms
;
Pathology
;
Receptor, Epidermal Growth Factor
;
Risk Factors
;
ROC Curve
;
Ultrasonography
9.Thyroid function in girls with central precocious puberty
Geehae JUNG ; Seok Bin OH ; Won Young LEE ; Hye Ryun KIM ; Hyo Kyoung NAM ; Jae Hyun KIM ; Young Jun RHIE ; Kee Hyoung LEE
Annals of Pediatric Endocrinology & Metabolism 2019;24(2):124-128
PURPOSE: Obesity is a well-known risk factor for central precocious puberty (CPP). Recently, elevated thyroid stimulating hormone (TSH) was reported in obese youth. However, few data regarding the relationship between CPP and TSH are available. The aim of this study was to evaluate thyroid function in girls with CPP and the relationship between CPP and serum TSH concentration. METHODS: This was a retrospective cross-sectional study. A total of 1,247 girls aged between 6.0 and 8.9 years who had undergone a gonadotropin-releasing hormone (GnRH) stimulation test to determine the presence of puberty were studied. Subjects were classified into CPP (n=554) and non-CPP (n=693) groups according to the results of the GnRH stimulation test. Characteristics and laboratory data of the CPP and non-CPP groups were compared and correlations between those characteristics and laboratory data and TSH concentration were evaluated. Serum TSH concentration in the CPP group was higher than that of the non-CPP group (3.19±1.55 mIU/L vs. 2.58±1.34 mIU/L, P<0.001). RESULTS: Serum free thyroxine (fT4) concentration in the CPP group was notably lower than that of the non-CPP group (1.38±0.14 ng/dL vs. 1.44±0.18 ng/dL, P<0.001). Across all subjects, 149 girls (11.9%) had hyperthyrotropinemia. The prevalence of hyperthyrotropinemia was higher in the CPP group compared to the non-CPP group (15.7% vs. 8.9%, P<0.001). TSH concentrations were positively correlated with age, height, weight, BMI, bone age, bone age advance, insulin-like growth factor 1 (IGF-1), IGF-1 standard deviation score, basal luteinizing hormone (LH), peak LH and basal follicle-stimulation hormone. TSH concentrations were negatively correlated with fT4. Multiple linear regression analysis showed that age (β=0.548, P<0.001) and peak LH (β=0.019, P=0.008) were independently associated with serum TSH concentration. CONCLUSIONS: Hyperthyrotropinemia in girls with CPP tends to be associated with pubertal LH elevation. In conclusion, pubertal onset may be associated with thyroid function.
Adolescent
;
Cross-Sectional Studies
;
Female
;
Gonadotropin-Releasing Hormone
;
Humans
;
Insulin-Like Growth Factor I
;
Linear Models
;
Luteinizing Hormone
;
Obesity
;
Prevalence
;
Puberty
;
Puberty, Precocious
;
Retrospective Studies
;
Risk Factors
;
Thyroid Gland
;
Thyrotropin
;
Thyroxine
10.The prevalence and risk factors of inhibitor development of FVIII in previously treated patients with hemophilia A
Blood Research 2019;54(3):204-209
BACKGROUND: Risk factors for the development of inhibitors in previously untreated patients (PUPs) have been reported; this is not the case in previously treated patients (PTPs) owing to fewer studies. Risk factors may differ for the development of PTP versus PUP inhibitors. We aimed to identify risk factors for PTP inhibitor development. METHODS: Participants were patients at a hemophilia treatment center in Korea with current or past history of factor VIII or factor IX alloantibodies. Observed inhibitors were classified as PUP or PTP inhibitors based on the cumulative number of exposure days. We compared the type and severity of hemophilia, mutation type, and family history of inhibitor between PUPs and PTPs. Events within 3 months before the first inhibitor detection, such as change of the factor concentrate used, short-term high exposure or continuous infusion of factor concentrate, history of surgery, infection, diagnosis of cancer, use of immunosuppressive or immunomodulator agents, and vaccination were compared between PUPs and PTPs. RESULTS: We observed 5 PUP inhibitors and 5 PTP inhibitors in 115 patients with hemophilia A. Events that might be related to the development of inhibitors within 3 months prior to the first inhibitor detection were observed in all 5 PTPs. On the contrary, no such events were observed in any PUPs. The observed events included a change in the factor concentrate used, subsequent chemotherapy, and short-term high exposure to factor concentrates for controlling hemorrhage and surgeries. CONCLUSION: Our results suggest a greater role of nongenetic factors in PTP inhibitor development.
Diagnosis
;
Drug Therapy
;
Factor IX
;
Factor VIII
;
Hemophilia A
;
Hemorrhage
;
Humans
;
Isoantibodies
;
Korea
;
Prevalence
;
Risk Factors
;
Vaccination

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