Table 1 Comparison of 12 characteristics in case and control groups
From: ADIPOQ single nucleotide polymorphisms and breast cancer in northeastern Mexican women
Characteristics | (n = 752) | p-value | |
|---|---|---|---|
Case (n = 397) | Control (n = 355) | ||
Mean ± SD or % | Mean ± SD or % | ||
Demographic factors | |||
Age at baseline interview (years) | 52.5 ± 12 | 49.5 ± 10.9 | 0.009a |
Height (m) | 1.56 ± 0.07 | 1.60 ± 0.07 | 0.871a |
BMI > 30 (kg/m2) | 0.001b | ||
Yes | 43.1 | 29.9 | |
No | 50.1 | 68.7 | |
n/a | 6.8 | 1.4 | |
Reproductive factors | |||
Age at menarche (years) | 12.8 ± 1.6 | 12.7 ± 1.5 | 0.379a |
Age at first childbirth (years) | 23.1 ± 5.6 | 23.4 ± 5.3 | 0.398a |
Number of children born alive | 3.3 ± 2 | 3.2 ± 2.2 | 0.115a |
Children | |||
Yes | 85.4 | 88.7 | 0.509 b |
No | 14.6 | 11.3 | |
Breast-feeding | 0.052b | ||
≤ 30 years old | 56.4 | 47.0 | |
≥ 30 years old | 7.8 | 4.8 | |
n/a | 35.8 | 48.2 | |
Breast-feeding duration (months) | 12.2 ± 13.0 | 14.2 ± 22.2 | 0.002a |
Menopausal status | 0.001b | ||
Yes | 63.2 | 44.2 | |
No | 33.0 | 55.5 | |
n/a | 3.8 | 0.3 | |
Age at menopause | 44.9 ± 5.7 | 45.9 ± 6.3 | 0.797a |
Hormonal factors | |||
Use of oral contraceptive | 0.001b | ||
Yes | 30.2 | 21.4 | |
No | 66.0 | 78.6 | |
n/a | 3.8 | 0.0 | |