Table 3.

Prevalence and distribution of visual impairment in more than 60 years old population (Nizwa elderly population study – 2005)

Variable	Visually impaired (Vn less than 20/200)	Examined	Persons with impairment	Rate of impairment	Projected in population	Adjusted rates*	95% confidence interval
Gender	Male	803	245	30.5	417	27.7	25.5	30.0
	Female	836	400	47.8	742	70.9	68.2	73.7
Age group (in years)	60 to 64	572	162	28.3	280	26.4	23.8	29.1
	65 to 69	360	114	31.7	287	32.0	28.9	35.0
	70 to 74	315	140	44.4	208	46.0	41.4	50.6
	75 to 79	137	54	39.4	139	42.0	36.7	47.4
	80 to 84	124	72	58.1	112	57.5	50.6	64.5
	85 and more	131	103	78.6	134	80.2	74.2	86.3
Residence	Urban	1,466	590	40.2	1061	38.3	36.5	40.1
	Rural	173	55	31.8	98	29.8	25.0	35.0
Total		1,639	647	39.5	1161	37.4	35.7	39.1

*Prevalence was adjusted for sex, age group and residence