Brief self-administered risk questionnaire for common nutrition-related diseases in middle school students / 中南大学学报(医学版)

OBJECTIVE@#To develop a self-administered risk questionnaire for common nutrition-related diseases in middle school students.@*METHODS@#Two phases were conducted to develop the questionnaire: scale development and validation. Phase 1 included 7 steps: (1) determining the objective, theoretical framework, principles and format for indicator generation; (2) setting up the preliminary indicator pool; (3) selecting indicators and forming pilot questionnaire through focus groups; (4) testing the pilot questionnaire; (5) further correcting the questionnaire using expert consultation; (6) choosing indicators again using good-poor analysis; and (7) shaping the final questionnaire. Phase 2 consisted of: (1) using the Pearson correlation coefficient to assess test-retest reliability; (2) using the Cronbach's alpha coefficient to assess the internal consistency reliability; (3) using the feedback from field investigation to assess face validity; and (4) using explanatory factor analysis to assess construct validity. Students from 96 classes were selected at random in Hunan Province as the field test samples using stratified sampling and cluster sampling. And the students from 4 out of the 96 classes were chosen again to serve as the test-retest samples. We used Epidata 3.0 to build the database and SPSS 11.0 to analyze the data.@*RESULTS@#A brief self-administered risk questionnaire for common nutrition-related diseases in middle school students with 12 items being formed after Phase 1. Good-poor analysis showed results from t tests for each item were statistically significant (P<0.05). The Pearson correlation coefficient was 0.76 (P<0.05) and the Cronbach's alpha coefficient was 0.56. The questionnaire was accepted by the students participating in the field test. Four common factors were extracted using explanatory factor analysis, accounting for 50.18% of the total variation.@*CONCLUSION@#The brief self-administered risk questionnaire for common nutrition-related diseases in middle school students is reliable and valid.

An investigation on the prevalence of internet addiction disorder in middle school students of Hunan province / 中华流行病学杂志

<p><b>OBJECTIVE</b>To study the prevalence of internet addiction disorder (IAD) in middle school students of Hunan and to explore its risk factors.</p><p><b>METHODS</b>5760 middle school students and their parents were sampled at random in Hunan province using two-stage sampling (stratified sampling and cluster sampling) method. The ten-item diagnosis tool for IAD, self-rating depression scale, self-rating anxiety scale, interpersonal sensitivity subscale of symptom checklist, family assessment device, parenting locus of control scale, and self-developed questionnaire were employed together to gather related data. 95% confidence interval (CI) was used to describe the prevalence of IAD. Chi-square and logistic regression tests were employed respectively to compare the differences of IAD prevalence among different subpopulations and to explore the possible influential factors.</p><p><b>RESULTS</b>The overall prevalence of IAD in middle school students of Hunan was 5.52%, with 95% CI as 4.84-6.20. IAD prevalence rates between males and females, being or not being monitored in the class and among different grades, showed significant differences (P < 0.05). No statistical difference was found between single child or having siblings in the family, being at key middle school or ordinary middle school, or within residential areas, (P > 0.05). Gender, tired of going to school, anxiety, interpersonal sensitivity, peer influence in haunting at internet bars, father's education level, the number of recreational settings in the community etc. were the influencing factors of IAD, with ORs as 0.281, 3.469, 2.318, 1.710, 1.877, 1.456, 1.273 and 0.726 respectively (P < 0.10).</p><p><b>CONCLUSION</b>The prevalence of IAD in middle school students of Hunan was moderate compared to the reported prevalence rates in other provinces. Gender and peer influence in haunting at internet bars and other 6 factors were suggested to be correlated with IAD events.</p>