Table 2. Lifestyle characteristics of women according to age at natural menopause.
| Characteristics | Age at natural menopause (years) | Ptrend | ||||
|---|---|---|---|---|---|---|
| ≤40 | 41–44 | 45–49 | 50–52 | ≥ 53 | ||
| Number of women N (%) | 581(3.40) | 1152 (6.75) | 7559 (44.27) | 5432 (31.81) | 2352 (13.77) | |
| Alcohol intake N (%) | 1.00 | |||||
| Never | 520(89.50) | 1024(88.89) | 6755(89.36) | 4794(88.25) | 2090(88.86) | |
| Occasional | 42(7.23) | 90(7.81) | 557(7.37) | 473(8.71) | 199(8.46) | |
| current regular | 19(3.27) | 38(3.30) | 247(3.27) | 165(3.04) | 63(2.68) | |
| Smoking status N (%) | <0.001 | |||||
| Never | 552(95.01) | 1100(95.48) | 7281(96.32) | 5234(96.35) | 2293(97.49) | |
| Occasional | 7(1.20) | 13(1.13) | 111(1.47) | 96(1.77) | 26(1.11) | |
| current regular | 22(3.79) | 39(3.39) | 167(2.21) | 102(1.88) | 33(1.40) | |
| Tea drinking N (%) | 0.14 | |||||
| Never | 413(71.08) | 819(71.09) | 5262(69.61) | 3779(69.57) | 1600(68.03) | |
| Occasional | 103(17.73) | 189(16.41) | 1357(17.95) | 929(17.10) | 420(17.86) | |
| current regular | 65(11.19) | 144(12.50) | 940(12.44) | 724(13.33) | 332(14.11) | |
| Physical activity N (%) | 0.05 | |||||
| Low | 164(28.23) | 279(24.22) | 2105(27.85) | 1480(27.25) | 614(26.11) | |
| Middle | 275(47.33) | 554(48.09) | 3608(47.73) | 2578(47.46) | 1160(49.32) | |
| High | 142(24.44) | 319(27.69) | 1846(24.42) | 1374(25.29) | 578(24.57) | |
| Sleep duration (hours) N (%) | 0.01 | |||||
| ≤6 | 123(21.17) | 246(21.35) | 1446(19.13) | 968(17.82) | 413(17.56) | |
| 7 | 175(30.12) | 315(27.34) | 2194(29.02) | 1528(28.13) | 680(28.91) | |
| 8 | 176(30.29) | 396(34.38) | 2514(33.26) | 1923(35.40) | 799(33.97) | |
| ≥9 | 107(18.42) | 195(16.93) | 1405(18.59) | 1013(18.65) | 460(19.56) | |
| Body mass index N (%) | <0.001 | |||||
| Underweight | 64(11.02) | 138(11.98) | 779(10.31) | 411(7.57) | 140(5.95) | |
| Normal weight | 342(58.86) | 638(55.38) | 4274(56.54) | 3045(56.06) | 1327(56.42) | |
| Overweight | 144(24.78) | 304(26.39) | 2018(26.70) | 1569(28.88) | 696(29.59) | |
| Obesity | 31(5.34) | 72(6.25) | 488(6.45) | 407(7.49) | 189(8.04) | |
Differences between the two menopausal age groups (≤ 44 years and ≥45 years) were compared using linear-by-linear association chi-square test.