Table 2

Risk of low vision 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		Low vision		Prevalence (%) of low vision		Low vision: age adjusted risk ratio (95% CL)	p Value
Administrative region	Year		Sample		Low vision		Crude	Age standardised to 1986 sample	Low vision: age adjusted risk ratio (95% CL)	p Value
Western	1986	3 146	44	1.40	1.40
Western	1996	7 538	111	1.47	1.90	0.7 (0.5–1.0)	0.07
Central	1986	2 007	31	1.54	1.54
Central	1996	1 504	38	2.53	2.77	0.6 (0.4–0.9)	0.01
Eastern	1986	2 379	31	1.30	1.30
Eastern	1996	4 004	60	1.50	1.91	0.7 (0.5–1.0)	0.08
All regions	1986	7 532	106	1.41	1.41
All regions	1996	13 046	209	1.60	2.05	0.7 (0.6–0.9)	<0.001