Table 7.
Selected breast cancer risk factors in recent Chinese migrants and postmenopausal Chinese women living in urban China
| Mean (SD) | Mean (SD) | |||||
|---|---|---|---|---|---|---|
| Recent Chinese Migrants | Postmenopausal | Recent Chinese Migrants | Postmenopausal | |||
| From Mainland China | Chinese Women | P a | From Hong Kong | Chinese Women | P a | |
| in This Study | Living in Shanghaib | in This Study | Living in Hong Kong | |||
| High school or higher (% yes) | 74.2 | 64.0 | 0.12 | 74.4 | NAc | NA |
| Age at menarche (years) | 14.6 (1.8) | 15.0 (2.0) | 0.03 | 12.8 (1.9) | 15.1 (2.3)d | <0.001 |
| Age at first live birth (years) | 25.2 (3.6) | 24.0 (4.0) | 0.001 | 26.9 (3.9) | NAc | NA |
| Number of live births | 2.2 (1.1) | 2.3 (1.0) | 0.30 | 2.1 (1.4) | 2.0 (2.0)e | 0.59 |
| Age at natural menopause (years) | 50.0 (3.4) | 48.0 (5.0) | <0.001 | 50.0 (3.2) | 49.4 (3.4)c | 0.08 |
| BMI (kg/m2) | 23.2 (3.0) | 24.2 (3.6) | 0.002 | 22.6 (3.2) | 22.2 (3.8)e to 23.6 (3.4)d | 0.58f |
a P values were based on chi-square significance test for educational attainment and t-tests for the rest of the variables.
b Data obtained from reference 10.
c Data is not available.
d Data obtained from reference 9
e Data obtained from reference 8
f Weighted mean was used for postmenopausal Chinese women living in Hong Kong when making the comparison.