Clustered from Scientific Research

Any vision impairment and blindness definitions based on US criteria. 2test for trend through age groups used to generate p values. Total prevalence across both males and females is presented. The whiskers are the 95% CIs generated using the logit method of the R survey package, which fits a logistic regression model, computing a Wald-type interval on the log-odds scale, for the prevalence of any vision impairment and blindness in each age group stratified by sex.

DOI