Table 1.
Demographic characteristics of controls (n=66) and cases (n=249)
| Controls (%) | Cases (%) | p | |
|---|---|---|---|
| Age | 0.048 | ||
| 50–59 | 36 (54.55) | 102 (40.96) | |
| 60–70 | 30 (45.45) | 147 (59.04) | |
| Gender | 0.550 | ||
| M | 30 (45.45) | 103 (41.37) | |
| F | 36 (54.54) | 146 (58.63) | |
| Finished education | <0.001 | ||
| Primary school | 4 (6.06) | 118 (47.39) | |
| High school | 32 (48.48) | 74 (29.72) | |
| Undergraduate | 30 (45.46) | 57 (22.89) | |
| Long-term residence | 0.818 | ||
| Rural | 6 (9.09) | 25 (10.04) | |
| Urban | 60 (90.90) | 224 (90.96) | |
| Self-assessment for understanding of cataract | 0.454 | ||
| Unaware | 49 (74.24) | 173 (69.48) | |
| Twilight | 15 (22.73) | 67 (26.91) | |
| Understand | 2 (3.03) | 9 (3.61) | |
| Hypertension | 0.001 | ||
| No | 56 (84.85) | 160 (64.26) | |
| Yes | 10 (15.15) | 89 (35.74) | |
| Diabetes | <0.001 | ||
| No | 64 (96.97) | 184 (73.90) | |
| Yes | 2 (3.03) | 65 (26.10) | |
| Family income (RMB/month) | <0.001 | ||
| <1,000 | 1 (1.52) | 55 (22.09) | |
| 1,000–2,000 | 13 (19.69) | 80 (32.13) | |
| >2,000 | 52 (78.79) | 114 (45.78) | |
| Smoking | 0.051 | ||
| No | 55 (83.33) | 178 (71.49) | |
| Yes | 11 (16.67) | 71 (28.51) | |
| Alcohol consumption | 0.337 | ||
| No | 39 (59.09) | 163 (65.46) | |
| Yes | 27 (40.91) | 86 (34.54) | |
| Tea | 0.269 | ||
| Seldom | 24 (36.36) | 104 (41.77) | |
| Sometimes | 24 (36.36) | 94 (37.75) | |
| Often | 18 (27.28) | 51 (20.48) | |
| Physical activity | 0.617 | ||
| Never | 30 (45.45) | 110 (44.18) | |
| Occasionally | 30 (45.45) | 105 (42.17) | |
| Often | 6 (9.10) | 34 (13.65) | |
| Exposure to the sun | 0.906 | ||
| Seldom | 29 (43.94) | 111 (44.58) | |
| Sometimes | 31 (46.97) | 110 (44.18) | |
| Often | 6 (9.09) | 28 (11.24) | |
| BMI | 0.208 | ||
| <18.5 | 2 (3.03) | 7 (2.81) | |
| 18.5–23.9 | 33 (50.00) | 107 (42.97) | |
| 24–27.9 | 26 (39.39) | 102 (40.96) | |
| >28 | 5 (7.58) | 33 (13.26) | |
| Waistline:hipline | 0.019 | ||
| M>0.9 or F>0.85 | 42 (63.64) | 118 (47.39) | |
| M<0.9 or F<0.85 | 24 (36.36) | 131 (52.61) |
M: male; F: female; BMI: body mass index. Statistical significance was accepted with p<0.05.