Pilot data supporting reliability and validity of a brief questionnaire to assess recreation screen time among undergraduates in China

Fifty-nine college students engaged in the pilot study. The mean age of participants was 20.27 (male 20.25; female 20.36). Table 2 shows ICC (95% CI) for total week by each recreation screen time sedentary behavior. The ICC values of all recreation activities were all > 0.70. Table 3 shows ICC (95% CI) of each recreational behavior for total week by gender. The ICC values of all recreation activities among gender were all > 0.70. Table 4 shows the paired samples T test between pre and post of each recreation screen time behavior. The values of p were all > 0.05. The outcomes showed that items in the back-translated version were clear with Kappa value was 0.85 (p < 0.01). The average recreation screen time was 423.52 (SD = 102.22) mins each day recorded by logbook and 384.07 (SD = 99.32) based on RSTQ. Pearson correlation coefficient was r = 0.49 (p<0.01). The average recreation screen time was 445.53 (SD = 93.25) for male and 327.50 (SD = 85.26) for female per day according to logbook. And that of representation by RSTQ was 400.10 (SD = 99.86) mins for male and 314.09 (SD = 61.05) mins for female.

本次试点研究共招募了59名大学生参与。参与者的平均年龄为20.27岁（男性20.25岁，女性20.36岁）。表2展示了根据每种休闲屏幕时间所进行的久坐行为的ICC（95%置信区间）。所有休闲活动的ICC值均大于0.70。表3展示了根据性别对每种休闲行为进行总周ICC（95%置信区间）的结果。性别间所有休闲活动的ICC值均大于0.70。表4展示了每种休闲屏幕时间行为在前后期的配对样本T检验。p值均大于0.05。结果显示，回译版本中的条目清晰明确，Kappa值为0.85（p<0.01）。平均休闲屏幕时间为每日通过日志记录的423.52分钟（标准差=102.22），通过RSTQ记录的为384.07分钟（标准差=99.32）。皮尔逊相关系数为r=0.49（p<0.01）。根据日志记录，男性的平均休闲屏幕时间为每日445.53分钟（标准差=93.25），女性的为327.50分钟（标准差=85.26）。而通过RSTQ表示的男性休闲屏幕时间平均为400.10分钟（标准差=99.86），女性为314.09分钟（标准差=61.05）。