Objective: To understand physical fitness among primary and middle school students in Henan Province, so as to provide theoretical basis for physical fitness promotion among primary and middle school students. Methods: Based on data of National Survey on Student Physical Fitness and Health in Henan Province in 2019, a total of 42 734 students were investigated. The Z value of each physical fitness index were calculated by Z method, physical fitness index (PFI) was obtained to reflect the physical fitness condition synthetically. Physical fitness of different groups were compared, and associated factors of PFI were analyzed by multiple linear regression. Results: Lung capacity, grip strength, standing long jump, 50 m run, 50 m×8 shuttle run and PFI in boys were [(2 552.1±1 226.5)mL, (26.0±13.9)N, (171.0±43.7)cm, (9.3±1.8)s, (132.1±22.6)s, (1.4±3.6)], respectively, which were significantly higher than that of girls [(1 965.2±765.3)mL, (19.1±8.2)N, (142.4±26.6)cm, (10.5±1.4)s, (136.9±21.1)s, (-1.4±3.2)]( t =59.35,62.66,81.87,-74.92,-16.72,85.96, P <0.01). The seated forward flexion of boys [(7.0±7.5)cm] was significantly lower than that of girls[(11.8±7.1)cm], the difference was statistically significant ( t =-68.57， P <0.01). Significant sex differences were observed in physical fitness at different age ( P <0.01). There was a certain gap between urban boys and rural boys in terms of strength quality, endurance quality and flexibility quality, and the physical quality of urban girls was better than that of rural girls as a whole. The detection rates of poor eyesight, malnutrition, overweight and obesity, anemia and high blood pressure of primary and middle school students were 68.0%, 5.4%, 26.0%, 15.9% and 18.0%, respectively. Region, sex, age and nutritional status(malnutrition,overweight and obesity) were the influencing factors of PFI( β =-0.23,-2.92,-0.11,-1.19, -0.78 , P <0.05). Conclusion Physical fitness among primary and middle school students varies in gender, age group, region and disease condition in Henan Province. Scientific intervention should be administered, especially for rural, female students, senior students, undernourished and overweight and obese students, to improve health awareness and physical fitness.

Objective: To track and investigate the changes in visual acuity of primary and secondary school students in Henan Province during the COVID-19 pandemic home confinement, so as to provide theoretical basis for the prevention and control of myopia. Methods: A cohort study design was employed for this research. In September 2019, visual acuity tests were conducted among 2 222 primary and secondary school students by Multi stage random cluster sampling method from four cities in Henan Province, including Zhengzhou, Xinxiang, Zhoukou, and Pingdingshan. A follow up study was conducted in June 2020, with on site visual acuity tests and questionnaire surveys. Wilcoxon rank sum test, Kruskal Wallis rank sum test, Chi square test, one way analysis of variance, and multiple linear regression model were used to analyze the changes in visual acuity of primary and secondary school students and the influencing factors from 2019 to 2020. Results: Compared with 2019, the overall myopia rate of students increased in 2020, and the difference was statistically significant (55.7%, 64.9%, χ 2=1 035.91, P <0.01), and the difference between mild, moderate and severe myopia rates occurred at 2 years (2019:32.4%, 18.8%, 4.4%, 2020:36.7%, 22.5%, 5.7%, χ 2= 8.43, 9.23, 3.94, P <0.05). The myopia incidence rate of primary and secondary school students in 2020 was 28.3%. As presented in multiple linear regression analysis, middle school, grade 4th-6th and grade 1st-3rd of primary school, low economic level, using television for online classes, the study desk being not bright on sunny days, without looking far away during breaks, the brightness of the study desk and desktop which was average on sunny days, and using roof lamp only when studying at night were associated with myopia progression among students ( B=-0.16, -0.18, -0.20, -0.06, -0.21, -0.13, -0.11, -0.40, P <0.05). Conclusions During 2019-2020, primary and secondary school students in Henan Province experience a progression towards myopia, which is comprehensively influenced by education stage, economic level, the habit of using eyes, and visual environment. Myopia prevention and control should be actively intervened and strengthened to improve the eye environment for primary and secondary school students, in order to slow down the development of myopia.

Objective: To determine the current prevalence of health risk behaviors among college students in Henan Province, and to conduct an in depth analysis of the impact of cumulative ecological risks on health risk behaviors, so as to provide scientific basis for promoting healthy development of adolescents. Methods: Using a multi stage stratified cluster sampling method, 9 743 college students from six universities in Henan Province were included as the research subjects from April to June 2023. A questionnaire survey was conducted using the College Student Cumulative Ecological Risk Scale and the China Urban Adolescent Health Related Behavior Survey Questionnaire (University Version). Data were analyzed by descriptive statistical analysis, Chi square test and binary Logistic regression. Results: The reporting rates of unhealthy eating behavior, unhealthy weight loss behaviors, lack of physical activity, daily risk behaviors, negative emotions, current smoking behavior current drinking behaviors, Internet addiction emotions and dangerous sexual behaviors among college students in Henan Province were 40.2%, 39.5%, 76.0%, 13.7%, 28.1%, 11.3%, 12.7%, 5.9% and 2.2%, respectively. The reporting rates of negative emotions, current smoking behaviors, current drinking behaviors, dangerous sexual behaviors and daily risk behaviors of college students were higher in boys than in girls ( χ 2=44.00, 995.20, 902.49, 121.95, 103.09, P <0.05). In terms of reporting rates of unhealthy diet, unhealthy weight loss and lack of exercise behavior, girls were higher than boys ( χ 2=107.59, 13.01, 145.83, P <0.05). Cumulative ecological risk was positively correlated with overall health risk behaviors. For every unit increase in the cumulative ecological risk index, the risk of health risk behaviors among college students increased by 48%. Conclusions The prevalence of health risk behaviors among college students is relatively common. It should adrocate for a healthy lifestyle, reduce the cumulative ecological risk and the occurrence of health risk behaviors to promote the healthy development of adolescents.

Objective: To analyze the present situation and associated factors of physical fitness and overweight and obesity among primary and middle school students in Henan Province, and so as to explore the related factors and to provide reference for improving students physical fitness. Methods: The data of students physical health survey in Henan Province in 2019 were used to analyze the PFI and BMI of students aged 7-18. The Chi square test was used to compare difference in overweight and obesity prevalence by gender and residence. Analysis of variance was used to compare PFI differences among students of different age groups. Multi variable Logistic regression analysis was conducted to analyze the influencing factors of physical fitness. Results: A large proportion of students PFI was between -5 and 5. 0-<5 group(46.8%), followed by -5-<0 group(44.0%), and ≥5 group. The detection rates of overweight and obesity were higher in boys (16.8%, 12.3%) than in girls (12.8%, 7.6%), and in cities (16.1%, 11.8%) than in rural areas (13.3%, 7.9%)( χ 2=124.78, 245.43; 62.52, 166.23, P <0.01). PFI was negatively correlated with BMI( r= -0.23 , P <0.01). Age ( OR =1.01), urban and rural (rural s OR =1.21), gender (female s OR =1.11), over weight ( OR =1.94), obesity ( OR =4.85) were the influencing factors of physical fitness( P <0.05). Conclusion Age, residence, gender, overweight and obesity are the related factors of physical fitness. Controlling overweight and obesity can effectively improve students physical fitness.

Objective: To analyze current status of physical exercise of primary and middle school students in Henan province, and to explore its relationship with physical fitness. Methods: Data on physical exercise and related indicators among 9-18 years old students was retrieved from Henan Provincial Student Physical Fitness and Health Survey in 2019. Physical fitness index (PFI), body mass index (BMI) was calculated. ANOVA was used to compare differences of physical exercise between men and women, urban and rural areas. Correlations between physical exercise with PFI and BMI were evaluated. Results: The majority of students had two PE classes per week (41.9%), daily active recess (44.5%), one sports meeting in each school year (46.8%), and half to one hour of physical exercise per day (50.1%). Boys were more likely to exercise than girls, while rural students were more likely to excecise than urban students. The proportion of parents who support sports activities in their spare time was the highest (75.8%), and the proportion of parents who both like sports was the highest (47.3%). PFI was positively correlated with exercise scores and negatively correlated with non exercise scores. BMI was negatively correlated with exercise scores and positively correlated with non exercise scores ( r =0.12, -0.13, -0.20, 0.14, P ＜0.01). Conclusion Physical exercise of primary and middle school students in Henan is satisfactory.Exercise scores are positively correlated with physical fitness, but negatively correlated with BMI.

Objective: To analyze dental caries and associated factors among primary and middle school students in Henan Province, so as to provide reference for dental caries prevention and control. Methods: The data of physical health survey of students in Henan Province in 2019 was analyzed for caries and other related index of students aged 7, 9, 12, 14 years. Chi square test was used to compare detection rate of caries by sex and residence, analysis of variance was used to compare the height between with and without risk of caries, and Logistic regression analysis was conducted for the influencing factors of caries. Results: The caries rate was 56.6%. And the male students (53.4%) was lower than the female students (59.7%). The urban students (53.4%) was lower than the rural students (59.8%)( χ 2=52.31,54.00, P <0.01). The height of the caries free group was higher than that of the caries group, and the height difference was 0.5-1.6 cm; the prevalence of caries decreased with the increase of age( χ 2=992.01, P < 0.01 ). The detection rate of anemia in caries group (16.7%) was higher than that in caries free group (14.9%)( χ 2=7.98, P <0.01). Multivariate Logistic regression analysis showed that age ( OR =0.82) gender ( OR =1.27) urban area and rural ( OR =1.26) overweight ( OR =0.67) and obesity ( OR = 0.67 ) were all influencing factors of dental caries( P <0.01). Conclusion Dental caries is high among primary and middle school students in Henan Province, and dental caries affects their growth, development and nutritional status, and the prevention and control measures of dental caries among primary and middle school students should be strengthened.

A medical device recall event tracking system was designed, which can enable the users to obtain the recall, early warning and other information related to medical devices in time. The tracking system can timely obtain and release the recall information of medical devices, effectively improve the quality control of hospital medical devices, reduce the use risk of medical devices, and ensure the life safety of patients.
Humans ; Medical Device Recalls ; Product Surveillance, Postmarketing

Objective: To understand physical fitness among students aged 13-18 years in Henan Province and its influencing factors. Methods: Data of 21 785 students aged 13-18 years who participated in the national physical fitness surveys in Henan Province in 2014 were analyzed based on phyical fitness indicators and the questionnarie of physical exercise. The qualified rates of physical fitness indicators were evaluated based on the "National Students Constitutional Health Standards"(2014 revised edition). Results: In 2014, the eligible rate for physical test was 85.6% for boys and 82.5% for girls. Higher eligible rate was observed among boys with sleep duration less than 7 hours, compared to those with higher than 7 hours, while lower eligible rate was more likely observed in boys who reported sweaty and tired in PE class(OR=0.76), sweay and extreme tired in PE class(OR=0.72). Higher eligible rate was more common among girls who attended exercise during recess 2-3 times per day (OR=1.18) compared to those attended exercises higher than 3 times per day. Lower eligible rate was more common among girls with sleep duration less than 7 hours (OR=0.88) and those with low attendance in school recess exercises(OR=0.77). Normal weight, living in urban area, sufficient and regular PE class, daily physical exercise for more than 1 hour, enjoying physical exercise and extracurricular sports activities or long-distance running activities have higher success rates(P<0.05). Conclusion There is a relatively high eligible rate of phyical fitness among middle school boys and girls in Henan Province. Physical fitness is related to multiple factors. These findings highlight the need to target physical fitness interventions with sufficient time allocation in PE class and physical activity so as to effectively promote the phyical quality of students.

Objective: To analyze the prevalence and associated factors of hypertension among primary and secondary school students aged 9-18 years in Henan province, and to provide scientific evidence for targeted hypertension prevention strategies. Methods: Data of 34 840 students aged 9-18 years with physical examination and questionnaire information came from National School Student Physical Fitness and Health Survey in 2014. Results: The prevalence of hypertension among primary and secondary school students aged 9-18 years in Henan Province was 11.5%. The prevalence of boys and girls was 13.1% and 9.9%, respectively, and boy’s was higher than girl’s (χ2=89.04, P<0.01). The prevalence of primary school, junior high school and senior high school was 13.0%, 12.1% and 9.2%, respectively, and primary school was higher compared with junior and senior high school (χ2=89.66, P<0.01). Binary logistic regression analysis showed that high BMI (OR=1.97), eating eggs every day (OR=1.11), attending more physical education classes every week (OR=1.16), doing more setting-up exercises during the break (OR=1.08) and playing electronic products for longer time (OR=1.09) were positively associated with risk of hypertension (P<0.05). While longer sleep time (OR=0.83) and more serious attitude toward setting-up exercises during the break (OR=0.91) were negatively associated with risk of hypertension (P<0.05). Conclusion The study documents a high prevalence of hypertension among primary and secondary school students in Henan Province, which is associated with multifarious factors. Therefore, effective prevention and control measures should be taken for different populations to prevent high blood pression.

Objective To discuss the safety and the application of the self-designed multifunctional inflatable pelvis and hip-joint fixator (MIPHF) in damage control in pelvic fracture patients.Methods The MIPHF was subjected to pressure test and quality inspection.From September 2016 to June 2017,61 pelvic-fracture patients were treated with our self-designed MIPHF as pre-hospital first-aid care according to the concept of damage control orthopedics (DCO) (MIPHF group).The control group consisted of 69 pelvic-fracture patients who had not received pre-hospital first-aid care with the self-designed MIPHF from December 2015 to August 2016.There were no statistically significant differences between the two groups in gender,age,types of pelvic fracture,and preoperative injure severity score (ISS).The study compared the two groups for the case fatality rate,volume of blood transfused during surgeries,early complication rates,fracture reduction (Matta standards),and long-term efficacy (Cole scores).Results The pressure test showed that the MIPHF had a good fixation effect on the pelvis.And the quality inspection showed that the material used for the MIPHF was in line with national standards and the safety was guaranteed.The MIPHF group had 1 death (1.6％) and the control group had 8 deaths (11.6％),which was a significant difference (x2=4.979,P=0.026).All survival patients in both groups were followed up.The MIPHF group (61 cases) received 3.0 to 18.0 months follow-up,with an average of 9.0 months.And the control group (69 cases) had 18.0 to 30.0 months follow-up,with an average of 21.9 months.In the MIPHF group,23 cases were treated conservatively,and 37 cases were treated with surgery.Among them,3 cases were fixed with external fixator,20 cases with anterior open reduction and internal fixation,9 cases with posterior open reduction and internal fixation,and 5 cases with combined anterior and posterior fixation.The timing of surgery was 1 to 20 days after injury,with an average of 4.1 days.The volume of blood transfused in the MIPHF group during surgery was 200 to 1500 ml,with an average of 628.6 ml.In the control group,27 patients were treated conservatively,and 42 patients were treated with surgery.Among them,2 cases were fixed with external fixator,24 cases with anterior open reduction and internal fixation,10 cases with posterior open reduction and internal fixation,and 6 cases with combined anterior and posterior fixation.The timing of surgery was 1 to 15 days after injury,with an average of 3.l days.The volume of blood transfused in the control group during surgery was 200 to 4000 ml,with an average of 1 707.1 ml.There was a significant difference between the two groups in intraoperative blood transfusion(Z=-2.330,P=0.020).The MIPHF group had 10 (16.4％) cases of early serious complications and the control group had 22 (31.9％) cases,which had a significant difference (x2=4.187,P=0.041).According to the criteria proposed by Matta et al.,the good rate of results for treating fractures was 82.0％ in the MIPHF group and 60.9％ in the control group,which got a significant difference (x2=6.967,P=0.008).The MIPHF group and the control group also differed significantly in their mean long-term Cole scores (27.2±4.0 versus 25.1 ±5.6,t=2.457,P=0.015).Conclusion MIPHF,which reflects the DCO concept,may be recommended as pre-hospital first-aid care for patients with pelvic fracture because it can lessen bleeding and prevent secondary pelvic injury,thus reduce case fatality rate and the incidence of complications.It can also improve the success rate of treating pelvic fracture,which will positively affect long-term outcomes.