Controls (n = 257) | Cases (n = 257) | P-value | |
---|---|---|---|
Age (years), means | 49.4 ± 8.9 | 49.4 ± 8.9 | 0.994 |
BMI (kg/m2) | |||
<23 | 125(48.6) | 95(37.0) | 0.019 |
23 - <25 | 68(26.5) | 75(29.2) | |
≥ 25 | 64(24.9) | 87(33.9) | |
Family history of cancer (yes)a | 93(41.0) | 108(46.4) | 0.245 |
Family history of thyroid cancer (yes)a | 5(2.2) | 6(2.6) | 0.794 |
Educational level | |||
Elementary school or less | 21(8.8) | 23(9.8) | 0.774 |
Middle school | 19(7.9) | 16(6.8) | |
High school | 95(39.6) | 84(35.9) | |
College or more | 105(43.8) | 115(47.4) | |
Monthly household incomeb | |||
<200 | 35(16.6) | 24(11.8) | 0.102 |
200 - <400 | 56(26.5) | 72(35.3) | |
>400 | 120(56.9) | 108(52.9) | |
Marital status | |||
Married | 218(90.8) | 215(90.0) | 0.480 |
Unmarried | 8(3.3) | 5(2.1) | |
Divorced/Widowed | 14(5.8) | 19(8.0) | |
Smoking status | |||
Nonsmoker | 147(64.8) | 158(69.3) | 0.215 |
Former smoker | 33(14.5) | 37(16.3) | |
Current smoker | 47(20.7) | 33(14.5) | |
Alcohol consumption | |||
Nondrinker | 87(36.4) | 100(41.5) | 0.208 |
Former drinker | 7(2.9) | 12(5.0) | |
Current drinker | 145(60.7) | 129(53.5) | |
Age at menarche (years)c | |||
≤13 | 35(22.0) | 31(20.5) | 0.680 |
14 | 34(21.4) | 34(22.5) | |
15 | 37(23.3) | 28(18.5) | |
≥16 | 53(33.3) | 58(38.4) | |
Menopause (yes)c | 83(47.7) | 79(43.9) | 0.472 |
Age at menopause (years)c | |||
<46 | 16(21.1) | 12(17.7) | 0.185 |
46 - <49 | 14(18.4) | 8(11.8) | |
49 - <52 | 14(18.4) | 23(33.8) | |
≥52 | 32(42.1) | 25(36.8) | |
Type of menopausec | |||
Natural | 57(71.3) | 51(64.6) | 0.366 |
Surgery, Other | 23(28.8) | 28(35.4) | |
Postmenopausal hormone use (ever)c | 28(36.8) | 20(30.8) | 0.448 |
Parity (yes)c | 157(96.3) | 159(98.2) | 0.315 |