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Table 1 Prevalence rates of blindness, SVI, Mod VI and Mild VI by age, sex, insurance, occupation and education*

From: Visual impairment and spectacle coverage rate in Baoshan district, China: population-based study

Characteristic   Presenting visual acuity Best-corrected visual acuity
  Total n Blind n(%;95%CI) SVI n(%;95%CI) Mod VI n(%;95%CI) Mild VI n(%;95%CI) Blind n(%;95%CI) SVI n(%;95%CI) Mod VI n(%;95%CI) Mild VI n(%;95%CI)
Age,y          
60-69 2907 14(0.48;0.23-0.73) 7(0.24;0.06-0.42) 152(5.22;4.42-6.04) 211(7.26;6.32-8.20) 10(0.34;0.13-0.56) 1(0.03;0–0.10) 37(1.27;0.87-1.68) 61(2.10;1.58-2.62)
70-79 1103 7(0.63;0.17-1.10) 6(0.54;0.11-0.98) 112(10.15;8.37-11.94) 201(18.22;15.94-20.50) 6(0.54;0.11-0.98) 2(0.18;0–0.43) 35(3.17;2.14-4.21) 87(7.89;6.30-9.48)
80~ 535 18(3.36;1.84-4.89) 7(1.31;0.35-2.27) 117(21.87;18.37-25.37) 160(29.91;26.03-33.79) 14(2.62;1.26-3.97) 1(0.19;0–0.55) 67(12.52;9.72-15.33) 91(17.01;13.83-20.19)
total 4545 39(0.86;0.59-1.13) 20(0.44;0.25-0.63) 381(8.38;7.58-9.19) 572(12.59;11.62-13.55) 30(0.66;0.42-0.90) 4(0.09;0.00-0.17) 139(3.06;2.56-3.56) 239(5.26;4.61-5.91)
Age adjusted   0.89(0.62-1.16) 0.48(0.28-0.68) 9.05(8.22-9.89) 14.02(13.01-15.03) 0.69(0.45-0.93) 0.11(0.01-0.20) 3.34(2.81-3.86) 6.03(5.34-6.72)
Gender          
Male 1910 17(0.89;0.47-1.31) 4(0.21;0-0.41) 130(6.81;5.68-7.94) 185(9.69;8.36-11.01) 13(0.68;0.31-1.05) 1(0.05;0–0.15) 47(2.46;1.77-3.16) 68(3.56;2.73-4.39)
Female 2635 22(0.83;0.49-1.18) 16(0.61;0.31-0.90) 251(9.53;8.40-10.65) 387(14.69;11.34-16.04) 17(0.65;0.34-0.95) 3(0.11;0–0.24) 92(3.49;2.79-4.19) 171(6.49;5.55-7.43)
Type of insurance          
No insurance 20 0(0;0-17.00) 0(0;0-17.00) 2(10.00;1.00-32.00) 2(10.00;1.00-32.00) 0(0;0–17.00) 0(0;0–17.00) 0(0;0–17.00) 1(5.00;0–24.00)
Urban insurance 2271 19(0.84;0.46-1.21) 11(0.48;0.20-0.77) 208(9.16;7.97-10.35) 284(12.51;11.15-13.87) 17(0.75;0.39-1.10) 1(0.04;0–0.13) 70(3.08;2.37-3.79) 127(5.59;4.65-6.54)
Others 2254 20(0.89;0.50-1.27) 9(0.40;0.14-0.66) 171(7.59;6.49-8.68) 286(12.69;11.31-14.06) 13(058;0.26-0.89) 3(0.13;0–0.28) 69(3.06;2.35-3.77) 111(4.92;4.03-5.82)
Occupation          
Peasant 1232 14(1.14;0.54-1.73) 4(0.32;0.01-0.64) 85(6.90;5.48-8.314) 156(12.66;10.81-14.52) 10(0.81;0.31-1.31) 1(0.08;0–0.24) 31(2.52;1.64-3.39) 61(4.95;3.74-6.16)
Non-peasant 3313 25(0.75;0.46-1.05) 16(0.48;0.25-0.72) 296(8.93;7.96-9.91) 416(12.56;11.43-13.68) 20(0.60;0.34-0.87) 3(0.09;0–0.19) 108(3.26;2.66-3.86) 178(5.37;4.60-6.14)
Level of Education          
Illiteracy 684 14(2.05;0.99-3.11) 4(0.58;0.01-1.16) 100(14.62;11.97-17.27) 149(21.78;18.69-24.88) 10(1.46;0.56-2.36) 1(0.15;0–0.43) 50(7.31;5.36-9.26) 78(11.40;9.02-13.79)
Primary school 2319 14(0.60;0.29-0.92) 14(0.60;0.29-0.92) 186(8.02;6.92-9.13) 280(12.07;10.75-13.40) 12(0.52;0.23-0.81) 3(0.13;0–0.28) 62(2.67;2.02-3.33) 113(4.87;4.00-5.75)
Secondary school or higher 1542 11(0.71;0.29-1.13) 2(0.13;0-0.31) 95(6.16;4.96-7.36) 143(9.27;7.83-10.72) 8(0.52;0.16-0.88) 0(0;0–17.00) 27(1.75;1.10-2.41) 48(3.11;2.25-3.98)
  1. *Data are given as numbers of persons (prevalence percentage; 95% confidence interval).
  2. Age adjusted to the 2000Shanghai census population. Data are given as prevalence percentage (95% confidence interval).