Associations between participation in an activity during the last week and case-control status; and stratified analyses by vision.

a Selling goods
b Listening to radio, Reading, Watching TV.
c Conditional logistic regression adjusted for self reported health problem in the last month. Visual impairment included moderate visual impairment, severe visual impairment and blindness. A dashed line indicates that comparison is not possible.
d Analysis was done using logistic regression adjusted for clustering using robust standard error methods and adjusted for age and self reported health problem. Odds ratios are relative to the controls. In the stratified analyses by vision, using the Benjamini and Hochberg method, only tests with a p-value below 0.002 have a False Discovery Rate of <5%.
Associations between participation in an activity during the last week and case-control status; and stratified analyses by vision.

a. 商品售卖
b. 收听广播、阅读、观看电视
c. 采用针对近1个月自述健康问题进行校正的条件logistic回归（conditional logistic regression），视力障碍涵盖中度视力障碍、重度视力障碍及失明，虚线表示无法进行比较
d. 本分析采用经稳健标准误（robust standard error）方法校正聚类效应，并针对年龄及自述健康问题进行调整的logistic回归完成，优势比（odds ratios）以对照组为参照。在按视力分层的分析中，采用本杰明-霍赫贝格校正法（Benjamini and Hochberg method），仅p值低于0.002的检验其错误发现率（False Discovery Rate, FDR）小于5%。
本研究围绕上周参与某项活动与病例对照状态（case-control status）之间的关联，以及按视力分层的分析两项内容展开。