表 3.
不同特征人群绝经年龄分布情况(n=38 483)
Distribution of age at menopause in different population groups (n=38 483)
| Characteristic | Total, n(%) | Postmenopausal, n(%) | Age at menopause | χ 2 | P value | |
| Mean±SEa | M (P25, P75)b | |||||
| a, the mean survival time and its standard error might be underestimated because the largest observation was censored and the estimation was res-tricted to the largest event time; b, the median survival time and interquartile range. | ||||||
| Birth cohort | 42.969 | < 0.001 | ||||
| 1951-1960 | 7 853 (20.41) | 7 845 (99.90) | 50.24±0.05 | 50.00 (48.00, 53.00) | ||
| 1961-1965 | 10 275 (26.70) | 10 015 (97.47) | 50.71±0.04 | 51.00 (49.00, 53.00) | ||
| 1966-1970 | 11 815 (30.70) | 8 046 (68.10) | 50.95±0.04 | 51.00 (49.00, 53.00) | ||
| 1971-1975 | 8 540 (22.19) | 1 670 (19.56) | 50.10±0.19 | 51.00 (49.00, 52.00) | ||
| Region | 7.605 | 0.006 | ||||
| Urban | 26 083 (67.78) | 18 302 (70.17) | 50.81±0.03 | 51.00 (49.00, 53.00) | ||
| Rural | 12 400 (32.22) | 9 274 (74.79) | 50.60±0.04 | 51.00 (49.00, 53.00) | ||
| Educational level | 29.068 | < 0.001 | ||||
| Primary school or below | 16 092 (41.82) | 13 280 (82.53) | 50.49±0.03 | 51.00 (48.00, 53.00) | ||
| Junior high school | 17 335 (45.05) | 11 281 (65.08) | 50.89±0.03 | 51.00 (49.00, 53.00) | ||
| Senior high school | 3 613 (9.39) | 2 335 (64.63) | 50.96±0.07 | 51.00 (49.00, 53.00) | ||
| College or above | 1 443 (3.75) | 680 (47.12) | 51.13±0.11 | 51.00 (50.00, 53.00) | ||