From: Genetic determinants of sporadic breast cancer in Sri Lankan women
Variable | Cases (n = 349) | Controls (n = 348) | P-value |
---|---|---|---|
aMean age (years) b[SD] | 60 [7] | 74 [6] | 0.001 |
Mean age at menarche (years) [SD] | 14 [2] | 14 [2] | 0.81 |
Mean age at first pregnancy (years) [SD] | 26 [7] | 25 [6] | 0.007 |
Mean number of children [SD] | 3 [2] | 4 [3] | 0.001 |
Mean age at menopause (years) [SD] | 48 [4] | 47 [6] | 0.003 |
Mean body mass index (kg/m2) [SD] | 25 [4] | 23 [4] | 0.001 |