Prevalence, Causes, and Risk Factors of Presenting Visual Impairment and Presenting Blindness in Adults Presenting to an Examination Center in Suzhou, China

Table 2

Prevalence of presenting visual impairment and presenting blindness (United States definition) stratified by age and gender.

Group (y)	No. of subjects	Bilateral				Monocular
		Visual impairment		Blindness		Visual impairment		Blindness
		No.	% (95% CI)	No.	%	No.	% (95% CI)	No.	% (95% CI)
Male
18–29	3250	106	3.26 (3.10–3.42)	0	0	129	3.97 (3.77–4.17)	5	0.15 (0.14–0.16)
30–39	6924	188	2.72 (2.58–2.86)	0	0	295	4.26 (4.05–4.47)	5	0.07 (0.07–0.07)
40–49	5535	196	3.54 (3.36–3.72)	1	0.02	297	5.37 (5.10–5.64)	11	0.2 (0.19–0.21)
50–59	5365	230	4.29 (4.08–4.50)	0	0	419	7.81 (7.42–8.20)	24	0.45 (0.43–0.47)
60–69	1730	110	6.36 (6.04–6.68)	2	0.12	219	12.66 (12.03–13.29)	23	1.33 (1.26–1.40)
70+	1335	293	21.95 (20.85–23.05)	7	0.52	285	21.35 (20.28–22.42)	48	3.6 (3.42–3.78)
Total	24139	1123	4.65 (4.42–4.89)	10	0.04	1644	6.81 (6.47–7.15)	116	0.48 (0.46–0.50)
Female
18–29	3604	178	4.94 (4.69–5.19)	0	0	238	6.6 (6.27–6.93)	5	0.14 (0.13–0.15)
30–39	6623	356	5.38 (5.11–5.65)	0	0	378	5.71 (5.42–6.00)	8	0.12 (0.11–0.13)
40–49	4347	266	6.12 (5.81–6.43)	2	0.05	289	6.65 (6.32–6.98)	7	0.16 (0.15–0.17)
50–59	3004	224	7.46 (7.09–7.83)	1	0.03	300	9.99 (9.49–10.49)	17	0.57 (0.54–0.60)
60–69	1385	167	12.06 (11.46–12.66)	3	0.22	220	15.88 (15.09–16.67)	19	1.37 (1.30–1.44)
70+	825	247	29.94 (28.44–31.44)	2	0.24	195	23.64 (22.46–24.82)	24	2.91 (2.76–3.06)
Total	19788	1438	7.27 (6.91–7.63)	8	0.04	1620	8.19 (7.78–8.60)	80	0.4 (0.38–0.42)
Combined
18–29	6854	284	4.14 (3.93–4.35)	0	0	367	5.35 (5.08–5.62)	10	0.15 (0.14–0.16)
30–39	13547	544	4.02 (3.82–4.22)	0	0	673	4.97 (4.72–5.22)	13	0.1 (0.10–0.11)
40–49	9882	462	4.68 (4.45–4.91)	3	0.03	586	5.93 (5.63–6.23)	18	0.18 (0.17–0.19)
50–59	8369	454	5.42 (5.15–5.69)	1	0.01	719	8.59 (8.16–9.02)	41	0.49 (0.47–0.51)
60–69	3115	277	8.89 (8.45–9.33)	5	0.16	439	14.09 (13.39–14.79)	42	1.35 (1.28–1.42)
70+	2160	540	25.00 (23.75–26.25)	9	0.42	480	22.22 (21.11–23.33)	72	3.33 (3.16–3.50)
Total	43927	2561	5.83 (5.54–6.12)	18	0.04	3264	7.43 (7.06–7.80)	196	0.45 (0.43–0.47)