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Objective To assess the methodology and quality on Meta-analysis used in papers being published in the Chinese Journal of Epidemiology.Methods Computerized literature searching was carried out in Wanfang Medical Online to collect articles that Meta-analysis was used in the Chinese Journal of Epidemiology since it was founded till December,2012.Manual retrieval was also conducted.Two researchers independently screened for literature and extracted data.Disagreements were resolved through discussion or by resort to a third reviewer if consensus was not reached.Qualities on methodologies or on the processes of reporting and reviewing,were evaluated by both AMSTAR and PRISMA scales.Statistical calculations and analyses were performed using SPSS 13.0.Results Fifty-five papers on meta-analyses were included in this study.Results on the qualities of methodology or evaluation showed that only 2 articles (3.6％) were rated as high,35 articles (63.7％) as moderate and 18 (32.7％) as low.The quality on methodology being used in literature had improved since 2008.However,there were still some problems seen in the following areas as the list of studies (included and excluded),comprehensive search on literature,quality of the included studies having been assessed and documented,etc.Results on evaluation of quality showed that the included reviews had high quality on the titles of the report,sources of information,summary measures and synthesis of results.However,areas as:structured summary,methods on searching,data collection,risk of bias in individual studies,summary of evidence,limitations,funding etc.,were still lack of comprehensive reports.Conclusion Articles on Meta-analysis published in the Chinese Journal of Epidemiology provided substantial evidence for more reliable information on the etiology and risk factors of the studies.However,both of the qualities on methodology and reports in the included literature presented problems at different levels that called for careful improvement.
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Objective To explore the physical and mental health status on the ‘left behind ’ students in Anhui province and the related influential factors.Methods Stratified cluster sampling method was used to investigate the 682 out of 3421 students from 7 middle schools in both south and north Anhui province,using multidimensional sub-health questionnaire of adolescents (MSQA) and mental health test (MHT),for assessment of the general condition,physical and mental health status.Results 14.22％ of the ‘left behind’ students were in sub-health condition compared to 11.28％ among the normal students,and the mental sub-health status represented 13.64％ for the former and 10.84％ for the latter.In addition,the ‘left behind’ students appeared less content with their life than those of staying with their parents (P＜0.05).MHT scores in the subjects were positively correlated with the scores on MSQA and showed significant difference (P＜0.01).Results from the multiple linear regression analysis showed that the mental health condition among the left behind students was in linear regression relationship with the decreased physical activity (β =1.456,P=0.001 ),emotional problems (β =1.096,P=0.000 ) and problems of social adaptation (β=1.011,P=0.006).The status of physical sub-health in the Anhui province showed that there was no significant difference in each of the study group (P＞0.05).Conclusion Decreased physical activity and emotion aporia as well as difficult social adaptation were major factors leading to degenerated mental health levels in the‘left-behind’ adolescents.The findings suggested that the mental health status could be improved inthis population through better management on their body-health condition.
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Objective By exploring the mental health situation of the unattended adolescents in Anhui province. This study aimed at investigating the status of mental health and related influential factors to provide evidence for effective strategies and intervention in physical and mental health improvement of this population. Methods By using stratified cluster sampling method, we conducted an investigation on 3421 subjects,in which 682 were unattended adolescents,from 7 middle schools in both south and north parts of Anhui province. MHT was used to assess the general condition and status of mental health in the adolescents. Results In the population aged 10 to 18 in Anhui province,19.94% of them were unattended adolescents and were found with poor mental health and more prone to loneliness, sensitive and stronger fear as compared with those with parents around, which showed statistical difference (P＜0.05). As for the mental health status of unattended adolescents in different family types, the subjects seemed worse in the north than in the south Anhui regarding the total scores of MHT, self-accusation, physical symptoms and phobic anxiety disorder (P＜0.05). Girl students were also inferior to boys concerning the total scores of MHT, learning anxiety, interpersonal anxiety, self-accusation, sensitivity, physical symptoms and impulsive behavior (P＜0.05). The students in Grade 7 scored lower than those of the upperclassmen on MHT (P＜0.05), and the subjects from township were superior to those of rural areas regarding interpersonal anxiety and loneliness (P＜0.05). Children with siblings appeared worse than their counterparts on the total scores of MHT, including the items of interpersonal anxiety, learning anxiety, self-accusation, sensitivity,physical symptoms, strong fear and impulsive behavior (P＜0.05). Conclusion Generally, the mental health status of unattended adolescents in Anhui province appeared poorer than their counterparts, and relatively worse psychological status was seen in girls, high school students,children with siblings and subjects living in north Anhui or rural areas.
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<p><b>OBJECTIVE</b>To investigate the changes of follicle-stimulating hormone (FSH), luteinizing hormone (LH), prolactin (PRL), estradiol (E2) and testosterone (T) in male adolescents of different ages by determining their levels in 8-17 years old boys.</p><p><b>METHODS</b>We included in this study 627 male adolescents aged 8-17 years and qualified through physical examinations. All the subjects underwent determination of FSH, LH, PRL, E2 and T with an automatic ACCESS microparticle chemiluminescence immunoassay analyzer and detection of liquid quality control by immunoassay.</p><p><b>RESULTS</b>FSH remained at a low level in the 8-10 years old male adolescents and increased at 11 years; the levels of LH and T were low before the age of 12 years and began to increase at 13 years; and that of E2 was low before the age of 13 years and began to rise after that, all with statistically significant differences (P < 0.01).</p><p><b>CONCLUSION</b>In the male adolescents, FSH, LH and T significantly increased at 11, 12 and 13 years old, respectively, which marked the beginning of sexual development.</p>