Busschaert Cedric, Cardon Greet, Van Cauwenberg Jelle, Maes Lea, Van Damme Joris, Hublet Anne, De Bourdeaudhuij Ilse, De Cocker Katrien
Department of Movement and Sport Sciences, Ghent University, Ghent, Belgium; Research Foundation Flanders (FWO), Brussels, Belgium.
Department of Movement and Sport Sciences, Ghent University, Ghent, Belgium.
J Adolesc Health. 2015 Apr;56(4):440-8. doi: 10.1016/j.jadohealth.2014.11.016. Epub 2015 Jan 27.
To examine tracking of weekday and weekend screen time (ST; i.e., television [TV] and computer [PC] time) from early adolescence to early adulthood and to identify social ecological predictors of weekday and weekend ST among boys and girls separately.
Data were retrieved from elementary schools (n = 59) in Flanders (Belgium). At baseline, 1,957 children (age, 9.9 ± .43 years) and one of the parents filled out a questionnaire on sedentary behavior and individual, social, and environmental variables. After a 10-year follow-up period, six hundred fifty-five 20-year-olds (age, 19.9 ± .43 years) filled out an adapted questionnaire on sedentary behavior, of which 593 contained full data at baseline and follow-up. Multiple regressions were performed to examine predictors (baseline) of ST (follow-up), and logistic regressions were used to analyze tracking of ST.
For boys, a consistent positive predictor of weekday and weekend TV and PC time at follow-up was ST at baseline (p < .01). For girls, drinking more soda at baseline predicted more weekday and weekend TV and PC time at follow-up (p ≤ .02). Some other individual variables also predicted ST in both boys and girls. Tracking was only found among boys; those exceeding the ST guideline at baseline were three to five times more likely to exceed this guideline at follow-up (p ≤ .001). Tracking was not present among girls.
To minimize TV and PC time during early adulthood, interventions for adolescent boys should focus on minimizing ST. For girls, focus should be on healthy eating. However, more research is warranted to confirm these conclusions.
研究从青春期早期到成年早期工作日和周末屏幕时间（ST，即看电视[TV]和使用电脑[PC]的时间）的追踪情况，并分别确定男孩和女孩工作日和周末ST的社会生态预测因素。
数据取自比利时弗拉芒地区的59所小学。在基线期，1957名儿童（年龄9.9±0.43岁）及其一名家长填写了一份关于久坐行为以及个人、社会和环境变量的问卷。经过10年的随访期后，655名20岁的年轻人（年龄19.9±0.43岁）填写了一份关于久坐行为的改编问卷，其中593份包含基线期和随访期的完整数据。进行多元回归以检验ST（随访期）的预测因素（基线期），并使用逻辑回归分析ST的追踪情况。
对于男孩，随访期工作日和周末看电视及使用电脑时间的一致正向预测因素是基线期的ST（p<0.01）。对于女孩，基线期喝更多汽水预测随访期工作日和周末看电视及使用电脑时间更多（p≤0.02）。其他一些个体变量也预测了男孩和女孩的ST。仅在男孩中发现了追踪现象；基线期超过ST指南的男孩在随访期超过该指南的可能性是其三到五倍（p≤0.001）。女孩中未发现追踪现象。
为了在成年早期尽量减少看电视和使用电脑的时间，针对青少年男孩的干预措施应侧重于尽量减少ST。对于女孩，应侧重于健康饮食。然而，需要更多研究来证实这些结论。
