Comparison of time spent on different activity categories at baseline and follow up among operated cases and controls.

*Mean time spent by participants with complete data at baseline and follow up. Participants with outlier values at either baseline or follow up were excluded.†P-value from paired t-test comparing time-use at baseline and follow up.‡P-value from anova comparing time-use among operated cases versus controls at a) baseline and b)follow up, controlling for age and gender.

* 纳入具备完整基线与随访数据的受试者的平均耗时。基线或随访阶段存在异常值的受试者均被排除。
† 配对t检验比较基线与随访阶段时间使用情况所得的P值。
‡ 方差分析（ANOVA）比较手术组与对照组在a)基线、b)随访阶段的时间使用差异，校正年龄与性别因素。