Table 7.

Age-standardized glaucoma prevalence rates

	Study sample		Prevalence of glaucoma				Magnitude of glaucoma
			Crude rate		Age-adjusted ratea		Estimated numbers
	N	%	N	%	%	95 % CI
Age group (years)
40–49	4889	35.97	93	1.90	1.51	1.96–2.94	166,308
50–59	3577	26.32	130	3.63	3.69	2.98–4.29	232,792
60–69	2773	20.40	178	6.42	8.85	3.99–5.43	318,689
70–79	1653	12.16	178	10.77	16.85	5.91–8.00	321,820
80+	699	5.14	103	14.74	12.32	14.72–20.98	181,807
Total	13,591	100	682	5.02	5.02	4.60–5.47	1,221,416

CI confidence interval

^aStandardized with the 2012 Nigeria population