1.Real-world efficacy and safety of azvudine in hospitalized older patients with COVID-19 during the omicron wave in China: A retrospective cohort study.
Yuanchao ZHU ; Fei ZHAO ; Yubing ZHU ; Xingang LI ; Deshi DONG ; Bolin ZHU ; Jianchun LI ; Xin HU ; Zinan ZHAO ; Wenfeng XU ; Yang JV ; Dandan WANG ; Yingming ZHENG ; Yiwen DONG ; Lu LI ; Shilei YANG ; Zhiyuan TENG ; Ling LU ; Jingwei ZHU ; Linzhe DU ; Yunxin LIU ; Lechuan JIA ; Qiujv ZHANG ; Hui MA ; Ana ZHAO ; Hongliu JIANG ; Xin XU ; Jinli WANG ; Xuping QIAN ; Wei ZHANG ; Tingting ZHENG ; Chunxia YANG ; Xuguang CHEN ; Kun LIU ; Huanhuan JIANG ; Dongxiang QU ; Jia SONG ; Hua CHENG ; Wenfang SUN ; Hanqiu ZHAN ; Xiao LI ; Yafeng WANG ; Aixia WANG ; Li LIU ; Lihua YANG ; Nan ZHANG ; Shumin CHEN ; Jingjing MA ; Wei LIU ; Xiaoxiang DU ; Meiqin ZHENG ; Liyan WAN ; Guangqing DU ; Hangmei LIU ; Pengfei JIN
Acta Pharmaceutica Sinica B 2025;15(1):123-132
Debates persist regarding the efficacy and safety of azvudine, particularly its real-world outcomes. This study involved patients aged ≥60 years who were admitted to 25 hospitals in mainland China with confirmed SARS-CoV-2 infection between December 1, 2022, and February 28, 2023. Efficacy outcomes were all-cause mortality during hospitalization, the proportion of patients discharged with recovery, time to nucleic acid-negative conversion (T NANC), time to symptom improvement (T SI), and time of hospital stay (T HS). Safety was also assessed. Among the 5884 participants identified, 1999 received azvudine, and 1999 matched controls were included after exclusion and propensity score matching. Azvudine recipients exhibited lower all-cause mortality compared with controls in the overall population (13.3% vs. 17.1%, RR, 0.78; 95% CI, 0.67-0.90; P = 0.001) and in the severe subgroup (25.7% vs. 33.7%; RR, 0.76; 95% CI, 0.66-0.88; P < 0.001). A higher proportion of patients discharged with recovery, and a shorter T NANC were associated with azvudine recipients, especially in the severe subgroup. The incidence of adverse events in azvudine recipients was comparable to that in the control group (2.3% vs. 1.7%, P = 0.170). In conclusion, azvudine showed efficacy and safety in older patients hospitalized with COVID-19 during the SARS-CoV-2 omicron wave in China.
2.Risk assessment and intervention effect of WeChat platform-based health management in high-risk populations for cardiovascular disease
Xiaoxiang MA ; Zhengwei WAN ; Jiulin LI ; Jinrui HE ; Feiyang FAN ; He LI ; Yang CHEN ; Wanjing CHEN ; Jinyu WANG ; Yanhua YANG
Chinese Journal of Health Management 2025;19(9):693-699
Objective:To explore the risk assessment and intervention effect of WeChat platform-based health management in high-risk populations for cardiovascular diseases (CVD).Methods:It was a randomized controlled trial. A total of 480 individuals at high risk of CVD who underwent physical examinations at the Health Management Center of Sichuan Provincial People′s Hospital from February to April in 2023 were selected using a simple random sampling method. The participants were randomly assigned to either the intervention group or the control group (240 cases each) using a random number table. The control group received routine follow-up and health assessments, while the intervention group received an additional 12-month WeChat-based health management intervention. During the study, 28 participants were lost to follow-up, resulting in 227 participants in the intervention group and 225 in the control group being included in the final analysis. The 10-year CVD risk was assessed using the prediction for atherosclerotic cardiovascular disease risk in China (China-PAR) model, and psychological status was evaluated using the self-rating anxiety Scale (SAS) and the self-rating depression scale (SDS). Changes in health behaviors, adherence, life style, blood pressure, metabolic indicators, psychological status, and CVD risk were compared before and after the intervention in both groups to evaluate the intervention′s effectiveness.Results:Among the 452 high-risk participants analyzed, the intervention group included 227 individuals [mean age: (53.16±10.81) years; 117 males and 110 females], and the control group included 225 individuals [mean age: (52.60±10.25) years; 118 males and 107 females]. There was no significant differences in baseline characteristics between the two groups (all P>0.05). After 12 months of intervention, the intervention group showed significant improvements in medication adherence, intake of vegetables and fruits, exercise duration, sleep time, proportion of regular lifestyle, and high density lipoprotein cholesterol (HDL-C) levels, all of which were all higher than both the baseline values and those in the control group (all P<0.05). Conversely, the intervention group showed reductions in medical visit rate, smoking and drinking rates, high-salt diet, meat intake, body mass index (BMI), fasting blood glucose, systolic and diastolic blood pressure, low density lipoprotein cholesterol (LDL-C), total cholesterol, triglycerides, SAS and SDS scores when compared to the baseline values and those in the control group (all P<0.05). The proportions of participants with 10-year CVD risk levels of 10%-<20%, 20%-<30%, 30%-<40%, and ≥40% significantly decreased in the intervention group after intervention (18.94% vs 36.12%, 12.78% vs 26.43%, 7.93% vs 19.82%, 3.96% vs 17.63%), and were also significantly lower than those in the control group (18.94% vs 40.45%, 12.78% vs 30.67%, 7.93% vs 22.67%, 3.96% vs 16.89%) (all P<0.001). After 12 months, the intervention group showed significantly higher improvement rates in both medication adherence and non-medication-related compliance behaviors, including smoking, alcohol consumption, meat and salt intake, fruit and vegetable intake, exercise duration, sleep duration, and lifestyle regularity, when compared to those in the control group (16.74% vs -3.11%, 14.54% vs -0.89%, 16.74% vs -0.44%, 57.71% vs 8.44%, 21.15% vs -0.44%, 56.83% vs -6.67%, 51.54% vs -3.56%, 60.79% vs -7.11%, 26.87% vs -13.78%, 22.91% vs -1.78%) (all P<0.001). Conclusion:The WeChat platform-based health management intervention can effectively improve the behavioral patterns, compliance, control of CVD risk factors and psychological status of high-risk populations for CVD, and help reduce their 10-year risk of CVD.
3.Risk assessment and intervention effect of WeChat platform-based health management in high-risk populations for cardiovascular disease
Xiaoxiang MA ; Zhengwei WAN ; Jiulin LI ; Jinrui HE ; Feiyang FAN ; He LI ; Yang CHEN ; Wanjing CHEN ; Jinyu WANG ; Yanhua YANG
Chinese Journal of Health Management 2025;19(9):693-699
Objective:To explore the risk assessment and intervention effect of WeChat platform-based health management in high-risk populations for cardiovascular diseases (CVD).Methods:It was a randomized controlled trial. A total of 480 individuals at high risk of CVD who underwent physical examinations at the Health Management Center of Sichuan Provincial People′s Hospital from February to April in 2023 were selected using a simple random sampling method. The participants were randomly assigned to either the intervention group or the control group (240 cases each) using a random number table. The control group received routine follow-up and health assessments, while the intervention group received an additional 12-month WeChat-based health management intervention. During the study, 28 participants were lost to follow-up, resulting in 227 participants in the intervention group and 225 in the control group being included in the final analysis. The 10-year CVD risk was assessed using the prediction for atherosclerotic cardiovascular disease risk in China (China-PAR) model, and psychological status was evaluated using the self-rating anxiety Scale (SAS) and the self-rating depression scale (SDS). Changes in health behaviors, adherence, life style, blood pressure, metabolic indicators, psychological status, and CVD risk were compared before and after the intervention in both groups to evaluate the intervention′s effectiveness.Results:Among the 452 high-risk participants analyzed, the intervention group included 227 individuals [mean age: (53.16±10.81) years; 117 males and 110 females], and the control group included 225 individuals [mean age: (52.60±10.25) years; 118 males and 107 females]. There was no significant differences in baseline characteristics between the two groups (all P>0.05). After 12 months of intervention, the intervention group showed significant improvements in medication adherence, intake of vegetables and fruits, exercise duration, sleep time, proportion of regular lifestyle, and high density lipoprotein cholesterol (HDL-C) levels, all of which were all higher than both the baseline values and those in the control group (all P<0.05). Conversely, the intervention group showed reductions in medical visit rate, smoking and drinking rates, high-salt diet, meat intake, body mass index (BMI), fasting blood glucose, systolic and diastolic blood pressure, low density lipoprotein cholesterol (LDL-C), total cholesterol, triglycerides, SAS and SDS scores when compared to the baseline values and those in the control group (all P<0.05). The proportions of participants with 10-year CVD risk levels of 10%-<20%, 20%-<30%, 30%-<40%, and ≥40% significantly decreased in the intervention group after intervention (18.94% vs 36.12%, 12.78% vs 26.43%, 7.93% vs 19.82%, 3.96% vs 17.63%), and were also significantly lower than those in the control group (18.94% vs 40.45%, 12.78% vs 30.67%, 7.93% vs 22.67%, 3.96% vs 16.89%) (all P<0.001). After 12 months, the intervention group showed significantly higher improvement rates in both medication adherence and non-medication-related compliance behaviors, including smoking, alcohol consumption, meat and salt intake, fruit and vegetable intake, exercise duration, sleep duration, and lifestyle regularity, when compared to those in the control group (16.74% vs -3.11%, 14.54% vs -0.89%, 16.74% vs -0.44%, 57.71% vs 8.44%, 21.15% vs -0.44%, 56.83% vs -6.67%, 51.54% vs -3.56%, 60.79% vs -7.11%, 26.87% vs -13.78%, 22.91% vs -1.78%) (all P<0.001). Conclusion:The WeChat platform-based health management intervention can effectively improve the behavioral patterns, compliance, control of CVD risk factors and psychological status of high-risk populations for CVD, and help reduce their 10-year risk of CVD.
4.Efficacy of pelvic floor optimization training of Yun-type aided with myoelectric biofeedback in the treatment of mild to moderate female stress urinary incontinence
Xiaoxiang WAN ; Wei JIAO ; Chaoliang SHI ; Jiawei WANG ; Jialing YAO ; Yangyun WANG ; Xilong WANG
Journal of Modern Urology 2025;30(5):390-394
Objective: To explore the efficacy of pelvic floor optimization training of Yun-type with the aid of myoelectric biofeedback in the treatment of mild to moderate female stress urinary incontinence (SUI). Methods: Female SUI patients treated in our hospital during Jan.and Oct.2024 were included as the research subjects.They were randomly divided into the control group (n=47) and observation group (n=48) by random number method.The control group received conventional Yun-type pelvic floor optimization training,while the observation group received Yun-type pelvic floor optimization training assisted with myoelectric biofeedback.The total treatment course lasted for 12 weeks.The clinical efficacy,as well as the changes in international consultation on incontinence questionnaire for symptoms and impact (ICI-Q-SF),incontinence quality of life (I-QoL),female sexual function index (FSFI),and pelvic floor electromyographic values before and after treatment were compared. Results: The total effective rate of the observation group was 93.6%,which was significantly higher than that of the control group (79.2%,P<0.05).After 12 weeks of treatment,the ICI-Q-SF [(6.12±1.11) vs. (6.97±1.24)],I-QoL [(85.05±4.51) vs. (82.14±4.60)],and FSFI [(30.01±4.10) vs. (26.32±3.32)] scores of the observation group were significantly better than those of the control group (P<0.05).After 12 weeks of treatment,the myoelectric values of the pelvic floor muscles of the observation group at the pre-rest stage,fast muscle (type Ⅱ muscle) stage,slow muscle (type Ⅰ muscle) stage,endurance test stage,and post-rest stage were significantly improved compared with those before treatment and were greatly enhanced compared with those of the control group (P<0.05).No serious adverse reactions occurred in either groups during treatment and follow-up. Conclusion: The Yun-type pelvic floor optimization training assisted with myoelectric biofeedback can precisely enhance the therapeutic effects of the conventional Yun-type pelvic floor optimization training,and significantly improve the female sexual function index.It is worthy of clinical promotion and application.
5.Effects of Qingfei-Jiedu-Huatan formula on VEGF/P38 pathway and pul-monary vascular endothelial barrier in mice with severe pneumonia
Siyuan CHENG ; Yunping BAI ; Yumeng CHENG ; Ran WAN ; Xiaoxiang XING ; Peng ZHAO ; Jiansheng LI
Chinese Journal of Pathophysiology 2025;41(3):524-533
AIM:To investigate the effects of the Qingfei-Jiedu-Huatan formula(QJHF)on damage to the lung vascular endothelial barrier induced by Klebsiella pneumoniae in mice with severe pneumonia,as well as to elucidate its underlying mechanisms.METHODS:Fifty-one C57BL/6J mice were randomly divided into control group(n=6),model group(n=15),QJHF group(n=15),and ceftriaxone sodium(CRO)group(n=15).Severe pneumonia was in-duced in the mice by a single tracheal intubation with 50 μL of 1×1011 CFU/mL Klebsiella pneumoniae on day 0.Six hours after modeling,the mice in QJHF and CRO groups received their respective treatments,while those in control and model groups were administered an equal volume of saline.All mice were sacrificed on day 3 after the end of gavage.Lung histo-pathological changes were assessed using hematoxylin-eosin(HE)staining.Levels of tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β),and IL-6 in lung tissues were measured by enzyme-linked immunosorbent assay(ELISA).Flow cytometry was used to detect CD11b+Ly6g+cells in bronchoalveolar lavage fluid(BALF).Proteomics and network pharma-cology analyses were conducted to elucidate the mechanisms of drug action.Western blot was conducted to assess the ex-pression levels of vascular endothelial cadherin(VE-cadherin),zonula occludens-1(ZO-1),occludin,vascular endothe-lial growth factor(VEGF),P38 mitogen-activated protein kinase(P38),and phosphorylated P38(p-P38)in lung tis-sues.RESULTS:Treatment with QJHF significantly attenuated the symptoms such as mental status and respiratory dis-tress,reduced mortality,mitigated lung tissue lesions,and decreased levels of IL-6,TNF-α,IL-1β,as well as BALF to-tal protein concentration,total cell count and neutrophil content in a mouse model of severe pneumonia(P<0.05 or P<0.01).Additionally,QJHF increased the expression of VE-cadherin,ZO-1 and occludin proteins in lung tissues.Pro-teomic analysis demonstrated that QJHF modulated the expression of 129 proteins in the lung tissues of mice suffering from severe pneumonia.Network pharmacology identified 328 potential targets associated with 14 major bioactive components of QJHF and 1 665 genes related to severe pneumonia,with 125 overlapping genes between the two datasets.The construc-tion of a protein-protein interaction(PPI)network,along with Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analyses of the regulated proteins and overlapping genes,indicated that QJHF primarily in-fluenced the PI3K-Akt,MAPK and Rap1 signaling pathways,as well as VEGFR.Western blot analysis showed that QJHF significantly inhibited the expression of VEGF and P38 in lung tissues(P<0.05 or P<0.01).CONCLUSION:Treatment with QJHF attenuates severe pneumonia in mice,potentially by inhibiting VEGF/P38 signaling to protect the vascular endothelial barrier.
6.Effects of Qingfei-Jiedu-Huatan formula on VEGF/P38 pathway and pul-monary vascular endothelial barrier in mice with severe pneumonia
Siyuan CHENG ; Yunping BAI ; Yumeng CHENG ; Ran WAN ; Xiaoxiang XING ; Peng ZHAO ; Jiansheng LI
Chinese Journal of Pathophysiology 2025;41(3):524-533
AIM:To investigate the effects of the Qingfei-Jiedu-Huatan formula(QJHF)on damage to the lung vascular endothelial barrier induced by Klebsiella pneumoniae in mice with severe pneumonia,as well as to elucidate its underlying mechanisms.METHODS:Fifty-one C57BL/6J mice were randomly divided into control group(n=6),model group(n=15),QJHF group(n=15),and ceftriaxone sodium(CRO)group(n=15).Severe pneumonia was in-duced in the mice by a single tracheal intubation with 50 μL of 1×1011 CFU/mL Klebsiella pneumoniae on day 0.Six hours after modeling,the mice in QJHF and CRO groups received their respective treatments,while those in control and model groups were administered an equal volume of saline.All mice were sacrificed on day 3 after the end of gavage.Lung histo-pathological changes were assessed using hematoxylin-eosin(HE)staining.Levels of tumor necrosis factor-α(TNF-α),interleukin-1β(IL-1β),and IL-6 in lung tissues were measured by enzyme-linked immunosorbent assay(ELISA).Flow cytometry was used to detect CD11b+Ly6g+cells in bronchoalveolar lavage fluid(BALF).Proteomics and network pharma-cology analyses were conducted to elucidate the mechanisms of drug action.Western blot was conducted to assess the ex-pression levels of vascular endothelial cadherin(VE-cadherin),zonula occludens-1(ZO-1),occludin,vascular endothe-lial growth factor(VEGF),P38 mitogen-activated protein kinase(P38),and phosphorylated P38(p-P38)in lung tis-sues.RESULTS:Treatment with QJHF significantly attenuated the symptoms such as mental status and respiratory dis-tress,reduced mortality,mitigated lung tissue lesions,and decreased levels of IL-6,TNF-α,IL-1β,as well as BALF to-tal protein concentration,total cell count and neutrophil content in a mouse model of severe pneumonia(P<0.05 or P<0.01).Additionally,QJHF increased the expression of VE-cadherin,ZO-1 and occludin proteins in lung tissues.Pro-teomic analysis demonstrated that QJHF modulated the expression of 129 proteins in the lung tissues of mice suffering from severe pneumonia.Network pharmacology identified 328 potential targets associated with 14 major bioactive components of QJHF and 1 665 genes related to severe pneumonia,with 125 overlapping genes between the two datasets.The construc-tion of a protein-protein interaction(PPI)network,along with Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analyses of the regulated proteins and overlapping genes,indicated that QJHF primarily in-fluenced the PI3K-Akt,MAPK and Rap1 signaling pathways,as well as VEGFR.Western blot analysis showed that QJHF significantly inhibited the expression of VEGF and P38 in lung tissues(P<0.05 or P<0.01).CONCLUSION:Treatment with QJHF attenuates severe pneumonia in mice,potentially by inhibiting VEGF/P38 signaling to protect the vascular endothelial barrier.
7.Clinical effects of animated video in preoperative communication between doctors and ureteral calculi patients
Xiaoxiang WAN ; Wei WANG ; Wei JIAO ; Wenzhang WANG ; Guowei SHI
Journal of Modern Urology 2023;28(8):670-673
【Objective】 To explore the clinical application effects of animated video in doctor-patient communication before surgical treatment of ureteral calculi. 【Methods】 A total of 278 cases of ureteral calculi treated in our hospital during Jan. and Dec.2021 were selected as subjects. According to the operation periods, 146 patients treated during Jan. and Jun.2021 were classified as the conventional group, who received traditional oral explanation for preoperative conversation, while 132 patients treated during Jul. and Dec.2021 were classified as the video group who watched animated video for preoperative conversation. The two groups of patients and their families were compared in terms of operation awareness, satisfaction of preoperative conversation, anxiety, preoperative ECG monitoring abnormalities, medical complaints and so on. 【Results】 The operation awareness [(93.35±2.33) vs. (89.21±2.78) points] and satisfaction of preoperative conversation [(94.27±2.33) vs. (91.36±3.68) points] of the video group were significantly higher than those of the conventional group (P<0.05). In terms of anxiety, abnormal preoperative ECG monitoring and medical complaints, the video group also had significant advantages (P<0.05). 【Conclusion】 Using animated video to assist preoperative conversation can effectively improve the awareness of patients and their families about the operation, and alleviate the anxiety and fear of patients, so that they are more cooperative. This ensures the smooth operation and reduces the occurrence of postoperative complaints.
8.Primary papillary mucinous adenocarcinoma of the ureter: a case report
Xiaoxiang WAN ; Wei JIAO ; Jun ZHANG ; Xilong WANG ; Guowei SHI
Chinese Journal of Urology 2023;44(7):542-543
The presence of adenocarcinoma in urothelium is rare and mucinous adenocarcinoma is even rarer. A case of primary ureteral papillary mucinous adenocarcinoma was reported. The patient was admitted to hospital due to dull pain in the left lumbar abdomen with abdominal distension for 2 years and aggravation with fever for 1 week. CT examination revealed left ureteral calculi, severe left renal hydronephrosis, and renal cortical atrophy. The diagnosis was left ureteral calculus with hydronephrosis and left renal dysfunction. Left kidney puncture and drainage were performed first, followed by laparoscopic nonfunctional nephrectomy and ureterolithotomy. The pathological diagnosis was left ureteral mucinous adenocarcinoma. The patient refused further adjuvant therapy and died 16 months after surgery due to extensive tumor metastasis.
9.Screening of diabetes among high-risk populations in Baoshan District
DING Chenghui ; WU Cui ; XUE Kun ; LI Xiaohong ; WAN Jinbao ; CHEN Qiuyan ; ZHU Xiaoxiang
Journal of Preventive Medicine 2023;35(6):509-513
Objective:
To investigate the prevalence of diabetes among individuals at high risk of diabetes in Baoshan District, Shanghai Municipality, so as to provide insights into community-based diabetes management.
Methods:
Permanent residents at ages of 35 years and older were sampled from Baoshan District using a multistage stratified cluster sampling method, and residents at a high risk of diabetes were screened using the Form for Risk Assessment of Diabetes among Community Residents in Shanghai Municipality. Participants' demographics, disease history and history of medication were collected using questionnaire surveys, and height, body weight, waist circumference, hip circumference, and blood pressure were measured. Diabetes was screened using fasting blood glucose and glucose tolerance test. The factors affecting the development of diabetes were identified among high-risk residents for diabetes using a multivariable logistic regression model.
Results:
A total of 3 107 residents at a high risk for diabetes were enrolled, including 1 165 men (37.50%) and 1 942 women (62.50%) with a mean age of (63.58±9.77) years. The prevalence of diabetes was 21.69% among the study subjects, and multivariable logistic regression analysis showed that men (OR=1.689, 95%CI: 1.357-2.104), age (40 years-, OR=4.833, 95%CI: 1.036-22.553; 50 years-, OR=2.627, 95%CI: 1.432-4.819; 60 years-, OR=1.551, 95%CI: 1.119-2.150; 70 years and older, OR=1.579, 95%CI: 1.232-2.025); high school/technical secondary school (OR=2.677, 95%CI: 1.636-4.380), overweight/obesity (OR=1.891, 95%CI: 1.447-2.472), hypertension (OR=1.306, 95%CI: 1.049-1.626), dyslipidemia (OR=1.428, 95%CI: 1.114-1.831), history of impaired glucose regulation (OR=15.161, 95%CI: 11.827-19.434) and family history of type 2 diabetes mellitus (OR=2.092, 95%CI: 1.619-2.704) caused an increased risk of diabetes among residents at a high risk diabetes.
Conclusions
The prevalence of diabetes was 21.69% among high-risk populations of diabetes in Baoshan District. Gender, age, educational level, overweight/obesity, hypertension, dyslipidemia, history of impaired glucose regulation and family history of type 2 diabetes mellitus are factors affecting the development of diabetes among high-risk populations.
10.Refractive status of children and adolescents in Gaoxin District of Chengdu
Chinese Journal of School Health 2022;43(10):1565-1569
Objective:
To investigate the refractive status of children and adolescents aged 4-18 years in Chengdu, and to analyze the epidemiological characteristics of refractive parameters.
Methods:
A cross sectional survey was conducted among 82 024 children and adolescents aged 4-18 years in Gaoxin District of Chengdu from August to September 2021. The prevalence of screening myopia, low vision rate, high myopia rate, refractive status and axial development were analyzed.
Results:
The prevalence of screening myopia in students aged 4-18 years was 40.42%(33 158/82 024). Low myopia was 24.51%(20 108/82 024), moderate myopia was 13.05%(10 703/82 024) and high myopia was 2.86%(2 347/82 024). The prevalence of screening myopia was 1.81% (233/12 848) in kindergarten, 34.44%(17 095/49 644) in primary school, 79.73%(9 738/12 214) in junior high school and 83.25% (6 092/7 318) in senior high school. The rate of visual impairment increased by year from the age of 4, and the rate of myopia increased most rapidly from 6 to 15 years old, the prevalenct of high myopia was compared between adjacent age groups: there were statistical differences between 9-15 years old were more likely to be nearsighted than boys( P <0.035 7). Significant differences in screening myopia between 5- and 7-17 year old groups,and in boys and girls.The median total diopter was 0.40 D at the age of 4 and developed to -2.90 D at the age of 18 . The diopter of girls aged 8-15 years was higher than that of boys, and there was statistical significance( Z=-2.53, -4.09, -5.67, -8.64, -5.56, -4.97, -2.52, -2.14, P <0.05). The axial length gradually increased with age, with the mean value of (22.31±0.59) mm at 4 years old and (24.91±1.00) mm at 18 years old. The mean corneal curvature did not change with age (43.19±1.47)D.
Conclusion
6-15 years old is a especially critical period for myopia development. More efforts need to be taken to decrease the prevalence of myopia before 6 years old. Prevention of the development of high myopia should start before the age of 10. The prevalence of myopia in girls is higher than that in boys, more prevention and control of myopia should focus on girls.


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