Factors | Cases (N = 2261; %) | Controls (N = 2261; %) | P | OR | 95% CI |
---|---|---|---|---|---|
Age (Years) | 49.44 ± 1.16 | 49.32 ± 1.18 | Matched | ||
Education level | |||||
No formal/primary school | 985 (43.56) | 968 (42.81) | Ref | ||
Middle/high school | 913 (40.38) | 904 (39.98) | 0.658 | 0.96 | 0.82–1.13 |
College/university/postgraduate | 359 (15.88) | 384 (16.98) | 0.136 | 0.82 | 0.64–1.06 |
Marriage status | |||||
Unmarried | 105 (4.64) | 91 (4.02) | Ref | ||
Married | 2151 (95.13) | 2170 (95.98) | 0.163 | 0.75 | 0.51–1.12 |
Average monthly household income (Yuan) | |||||
≤ 2000 | 1646 (72.80) | 1598 (70.68) | Ref | ||
2000–5000 | 271 (11.99) | 242 (10.70) | 0.947 | 1.01 | 0.81–1.25 |
> 5000 | 341 (15.08) | 415 (18.35) | 0.001 | 0.69 | 0.55–0.85 |
Body mass index (kg/m2) | |||||
Normal weight (18.5–23.9) | 1298 (57.41) | 1416 (62.63) | Ref | ||
Underweight (< 18.5) | 79 (3.49) | 122 (5.40) | 0.012 | 0.67 | 0.49–0.91 |
Overweight (24.0–27.9) | 652 (28.84) | 581 (25.70) | 0.002 | 1.26 | 1.09–1.45 |
Obese (≥ 28.0) | 157 (6.94) | 142 (6.28) | 0.073 | 1.25 | 0.98–1.59 |
Alcohol category | |||||
Never | 1848 (81.73) | 1670 (73.86) | Ref | ||
Occasional | 337 (14.90) | 495 (21.89) | < 0.001 | 0.55 | 0.47–0.66 |
Current regular | 76 (3.36) | 96 (4.25) | 0.013 | 0.66 | 0.48–0.92 |
History of goiter | |||||
No | 1346 (59.53) | 633 (28.00) | Ref | ||
Yes | 181 (8.01) | 19 (0.84) | < 0.001 | 8.67 | 3.72–20.18 |
History of nodules | |||||
No | 1175 (51.97) | 555 (24.55) | Ref | ||
Yes | 352 (15.57) | 96 (4.25) | < 0.001 | 2.35 | 1.66–3.32 |