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Table 7 Selected breast cancer risk factors in recent Chinese migrants and postmenopausal Chinese women living in urban China

From: Risk factors for breast cancer in postmenopausal Caucasian and Chinese-Canadian women

  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
  1. a P values were based on chi-square significance test for educational attainment and t-tests for the rest of the variables.
  2. b Data obtained from reference 10.
  3. c Data is not available.
  4. d Data obtained from reference 9
  5. e Data obtained from reference 8
  6. f Weighted mean was used for postmenopausal Chinese women living in Hong Kong when making the comparison.
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