Demographic and visual acuity characteristics of operated cases and controls examined at baseline and follow-up.

*P-value from anova (continuous variables) or chi Square (categorical variables) comparing operated cases and controls.±Highest quartile of socio-economic status (SES).¥Presenting visual acuity in the better eye at baseline.†Presenting visual acuity in the better eye among operated cases at follow up classified by WHO cataract surgical outcome categories.PL, Perception of light.