Prevalence and Risk Factors for Adult Cataract in the Jingan District of Shanghai

Table 3

Age- and gender-specific prevalence of bilateral visual impairment using the definition of the World Health Organization in 2010.

Groups	No. of participants	Low vision		Blindness		Low vision and blindness combined
		No.	% (95% CI)	No.	% (95% CI)	No.	% (95% CI)
Age (years)
40 ∼ 49	240	16	6.7 (3.5–9.8)	—	—	16	6.7 (3.5–9.8)
50 ∼ 59	1035	77	7.4 (5.8–9.0)	6	0.6(0.1–1.0)	83	8.0 (6.4–9.7)
60 ∼ 69	775	57	7.4 (5.5–9.2)	4	0.5 (0.0–1.0)	61	7.8 (6.0–9.8)
70 ∼ 79	595	76	12.8 (10.1–15.5)	4	0.6 (0.0–1.3)	80	13.4 (10.7–16.2)
≥80	239	66	27.6 (21.9–33.3)	1	0.4 (−0.4–1.2)	67	28.0 (22.3–33.7)
		< 0.001		= 0.980		< 0.001
Male	1054	88	8.3 (6.7–10.0)	3	0.28 (0–0.6)	91	8.6 (6.9–10.3)
Female	1830	204	11.1 (9.7–12.6)	12	0.7 (0.3–1.0)	216	11.8 (10.3–13.3)
		= 0.021		= 0.182		= 0.008
Total	2884	292	10.1 (9.0–11.2)	15	0.5 (0.3–0.8)	307	10.6 (9.5–11.8)

No. = number; CI = confidence interval; — = data not available. Fisher’s exact test.