Risk of blindness in the Gambia in 1996 compared with that in 1986, in the three main administrative regions. The western region includes Banjul City where the eye hospital is located. The age adjusted risk ratios are Mantel–Haenszel weighted relative risk estimates from analysis of age stratified data
Administrative region | Year | Sample | Blind | Prevalence (%) of blindness | Blindness: age adjusted risk ratio (95% CL) | p Value | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Crude | Age standardised to 1986 sample | ||||||||||||
Western | 1986 | 3 146 | 25 | 0.79 | 0.79 | ||||||||
1996 | 7 538 | 21 | 0.28 | 0.37 | 2.2 (1.2–3.8) | 0.01 | |||||||
Central | 1986 | 2 007 | 18 | 0.90 | 0.90 | ||||||||
1996 | 1 504 | 12 | 0.80 | 0.84 | 1.1 (0.5–2.1) | >0.99 | |||||||
Eastern | 1986 | 2 379 | 10 | 0.42 | 0.42 | ||||||||
1996 | 4 004 | 22 | 0.55 | 0.69 | 0.6 (0.3–1.3) | 0.28 | |||||||
All regions | 1986 | 7 532 | 53 | 0.70 | 0.70 | ||||||||
1996 | 13 046 | 55 | 0.42 | 0.55 | 1.3 (0.9–1.9) | 0.19 |