Screened factors | Controls (n = 226) | Cases (n = 113) | b c | P | ORa | 95 % CIb (OR) | |
---|---|---|---|---|---|---|---|
Education level, n (%) | Â | Â | Â | 0.031* | Â | Â | Â |
 College and above | 56 (24.8) | 21 (18.6) |  |  | 1 |  |  |
 Middle school | 160 (70.8) | 79 (69.9) | 0.500 | 0.206 | 1.650 | 0.760 | 3.582 |
 Primary school and below | 10 (4.4) | 13 (11.5) | 1.542 | 0.009* | 4.673 | 1.476 | 14.795 |
Family income (Yuan/year/person), n (%) | Â | Â | Â | 0.003* | Â | Â | Â |
 > 15,000 | 22 (9.7) | 6 (5.3) |  |  | 1 |  |  |
 10,001–15,000 | 10 (4.4) | 1 (0.9) | −1.003 | 0.381 | 0.367 | 0.039 | 3.462 |
 5001–10,000 | 107 (47.3) | 39 (34.5) | 0.290 | 0.056 | 1.336 | 0.504 | 3.541 |
 ≤ 5000 | 87 (38.5) | 67 (59.3) | 1.038 | 0.034* | 2.824 | 1.084 | 7.355 |
Premarital medical examination, n (%) | 56 (24.8) | 13 (11.5) | −0.930 | 0.005* | 0.395 | 0.206 | 0.757 |
Upper respiratory tract infection, n (%) | 75 (33.2) | 55 (48.7) | 0.647 | 0.006* | 1.909 | 1.204 | 3.028 |
Complications of pregnancy, n (%) | 6 (2.7) | 9 (8.0) | 1.155 | 0.033* | 3.173 | 1.100 | 9.149 |
Contraceptive intake before pregnancy, n (%) | 2 (0.9) | 6 (5.3) | 1.837 | 0.026* | 6.280 | 1.247 | 31.634 |
Maternal occupational hazards exposure, n (%) | 5 (2.2) | 16 (14.2) | 1.987 | 0.000* | 7.291 | 2.597 | 20.466 |
Housing renovation, n (%) | 11 (4.9) | 21 (18.6) | 1.495 | 0.000* | 4.461 | 2.067 | 9.629 |
Fish/shrimp/meat/eggs intake, n (%) | Â | Â | Â | 0.033* | Â | Â | Â |
 ≤ 2 times/week | 16 (7.1) | 15 (13.3) |  |  | 1 |  |  |
 3~5 times/week | 79 (35.0) | 48 (42.5) | −0.434 | 0.282 | 0.648 | 0.294 | 1.429 |
 > 5 times/week | 131 (58.0) | 50 (44.2) | −0.899 | 0.023* | 0.407 | 0.187 | 0.885 |
Milk/soymilk intake, n (%) | Â | Â | Â | 0.000* | Â | Â | Â |
 ≤ 2 times/week | 26 (11.5) | 35 (31.0) |  |  | 1 |  |  |
 3~5 times/week | 82 (36.3) | 36 (31.9) | −1.120 | 0.001* | 0.326 | 0.172 | 0.619 |
 > 5 times/week | 118 (52.2) | 42 (37.2) | −1.330 | 0.000* | 0.143 | 0.143 | 0.490 |
Paternal occupational hazards exposure, n (%) | 3 (1.3) | 14 (12.4) | 2.352 | 0.000* | 10.512 | 2.954 | 37.402 |
Paternal strong tea drinking, n (%) | 20 (8.8) | 20 (17.7) | 0.795 | 0.019* | 2.215 | 1.138 | 4.313 |
Family history of NSCL/P, n (%) | 2 (0.9) | 13 (11.5) | 6.678 | 0.000* | 14.560 | 3.225 | 65.728 |