From: Cytochrome P450 1A2 (CYP1A2) activity and risk factors for breast cancer: a cross-sectional study
Variable | β (SE) | F | P | Quartiles (mean [95% confidence interval]) | P for trend | |||
---|---|---|---|---|---|---|---|---|
 | Model R2 = 0.41 |  |  | Q1 | Q2 | Q3 | Q4 |  |
Current smoker? | ||||||||
No (n = 133) | 5.05 (4.58, 5.57)1 | 24.52 | <0.0001 | Â | Â | Â | Â | Â |
Yes (n = 14) | 7.69 (6.45–9.17) |  |  |  |  |  |  |  |
Triglycerides (mmol/day)3 | -0.28 (0.07) | 15.49 | 0.0001 | 7.22 (6.15–8.42) | 6.40 (5.53–7.42) | 6.28 (5.34–7.39) | 5.41 (4.59–6.38) | 0.003 |
HDL (mmol/day)3 | -0.42 (0.13) | 10.57 | 0.001 | 7.39 (6.48–8.43) | 6.49 (5.66–7.44) | 6.62 (5.83–7.52) | 5.58 (4.80–6.49) | 0.008 |
SHBG2 | 0.05 (0.02) | 8.49 | 0.004 | 5.95 (5.19–6.82) | 6.30 (5.58–7.11) | 7.39 (6.48–8.43) | 7.03 (6.19–7.98) | 0.01 |
Age at menarche (years) | -0.03 (0.02) | 5.17 | 0.02 | 6.73 (6.01–7.54) | 7.08 (6.27–7.99) | 6.69 (5.76–7.78) | 5.60 (4.89–6.41) | 0.03 |
IGF-1 (ng/ml)2 | 0.04 (0.02) | 4.74 | 0.03 | 6.49 (5.71–7.39) | 6.55 (5.77–7.44) | 6.28 (5.59–7.05) | 7.34 (6.40–8.41) | 0.22 |