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

Table 1

Baseline characteristics of participants (N = 2894).

Variable		N = 2894	% (95% CI)
Gender	Male	1056	36.5 (34.7–38.2)
	Female	1838	63.5 (61.8–65.3)
Ethnic	Han	2891	99.9 (99.8–100.0)
	Others	3	0.1 (0.0–0.2)
Marital status	Married	2275	78.6 (77.1–80.1)
	Divorced	95	3.3 (2.6–3.9)
	Widowed	404	14.0 (12.7–15.2)
	Never married	120	4.1 (3.4–4.9)
Education	None/primary school only	601	20.8 (19.3–22.2)
	Secondary school	1872	64.7 (62.9–66.4)
	University	421	14.5 (13.3–15.8)
Smoking	Yes	472	16.3 (15.0–17.7)
	No	2421	83.7 (82.3–85.0)
Drinking	Yes	402	13.9 (12.6–15.2)
	No	2491	86.1 (84.8–87.3)
Time of using computer	No	1987	68.7 (67.0–70.3)
	1∼2 h/d	516	17.8 (16.4–19.2)
	3∼8 h/d	358	12.4 (11.2–13.6)
	>8 h/d	33	1.1 (0.8–1.5)
Time of using television	No	123	4.3 (3.5–5.0)
	1∼2 h/d	1190	41.1 (39.3–42.9)
	3∼8 h/d	1518	52.5 (50.6–54.3)
	>8 h/d	63	2.2 (1.6–2.7)
Time to use air conditioners	No	2401	83.0 (81.6–84.3)
	1∼2 h/d	275	9.5 (8.4–10.6)
	3∼8 h/d	188	6.5 (5.6–7.4)
	>8 h/d	30	1.0 (0.7–1.4)
Hypertension	Yes	1104	38.1 (36.4–39.9)
	No	1789	61.8 (60.0–63.6)
Diabetes	Yes	386	13.3 (12.1–14.6)
	No	2507	86.6 (85.4–87.9)
Infectious diseases	Yes	1	0.0 (0.0–0.1)
	No	2892	99.9 (99.8–100.0)
Refractive error	Yes	1398	48.3 (46.5–50.1)
	No	1495	51.7 (49.8–53.5)
Ocular trauma	Yes	49	1.7 (1.2–2.2)
	No	2844	98.3 (97.8–98.7)
Contact lenses	Yes	4	0.1 (0.0–0.3)
	No	2889	99.8 (99.7–100.0)

N = number; CI = confidence interval.