Beijing | Shanghai | Chengdu | Guangzhou | Shenyang | Wuhan | Total | ||
N | 20s | 90 | 37 | 68 | 74 | 101 | 79 | 449 |
30s | 27 | 86 | 56 | 49 | 22 | 30 | 270 | |
40s | 62 | 46 | 51 | 56 | 49 | 38 | 302 | |
50s | 40 | 39 | 46 | 33 | 53 | 52 | 263 | |
60s | 5 | 19 | 5 | 4 | 2 | 24 | 59 | |
Age (mean ± SD) | 20s | 24.8 ± 2.3 | 25.6 ± 2.1 | 25.9 ± 1.8 | 26.1 ± 2.0 | 26.0 ± 1.7 | 24.9 ± 1.9 | 25.6 ± 2.0 |
30s | 35.5 ± 2.7 | 34.2 ± 2.7 | 34.9 ± 2.9 | 35.1 ± 3.2 | 35.8 ± 3.4 | 33.3 ± 2.8 | 34.6 ± 2.8 | |
40s | 44.1 ± 3.1 | 44.7 ± 2.7 | 44.1 ± 2.5 | 44.5 ± 3.0 | 45.0 ± 3.0 | 45.8 ± 3.0 | 44.5 ± 2.9 | |
50s | 54.3 ± 2.7 | 55.0 ± 3.1 | 53.7 ± 2.8 | 53.7 ± 3.1 | 53.8 ± 2.3 | 54.4 ± 2.9 | 54.2 ± 2.8 | |
60s | 62.2 ± 2.3 | 62.6 ± 1.6 | 61.8 ± 2.2 | 62.3 ± 2.1 | 64.0 ± 1.4 | 62.1 ± 2.0 | 62.2 ± 1.8 |