Table 2. Risk factors associated with the Breast cancer.
| Factors | Cases n | Controls n | χ2 | P-value | OR (95%CI)* | P-value |
|---|---|---|---|---|---|---|
| Menarcheal age | ||||||
| >14 | 9 | 11 | 2.347 | 0.309 | 1 | |
| 12_14 | 88 | 146 | 0.737 (0.294–1.848) | 0.515 | ||
| <12 | 6 | 4 | 1.833 (0.392–8.566) | 0.441 | ||
| Cycle length | ||||||
| Normal (3–7) | 95 | 141 | 3.606 | 0.165 | 1 | |
| Short (1–2) | 3 | 14 | 0.318 (0.089–1.137) | 0.078 | ||
| Long (> 7) | 5 | 6 | 1.273 (0.3674–4.169) | 0.732 | ||
| Parity | ||||||
| Parous | 85 | 25 | 122.262 | 0.000 | 1 | |
| Nulliparous | 18 | 136 | 0.034 (0.017–0.067) | 0.000 | ||
| Age at first birth | ||||||
| <20 | 22 | 3 | 1.118 | 0.773 | 1 | |
| 20–24 | 34 | 7 | 0.711 (0.114–4.442) | 0.715 | ||
| 25–29 | 16 | 5 | 1.079 (0.19–6.117) | 0.931 | ||
| >29 | 9 | 2 | 1.63 (0.232–11.455) | 0.624 | ||
| Lactational history | ||||||
| Yes | 83 | 23 | 112.407 | 0.000 | 1 | |
| No | 20 | 138 | 0.042 (0.022–0.081) | 0.000 | ||
| BMI | ||||||
| Normal (18–25) | 42 | 82 | 45.717 | 0.000 | 1 | |
| Underweight (< 18) | 7 | 52 | 0.263 (0.110–0.629) | 0.003 | ||
| Overweight (25–30) | 39 | 20 | 3.807 (1.978–7.328) | 0.000 | ||
| Obesity (> 30) | 15 | 7 | 4.184 (1.584–11.04) | 0.004 | ||
| W/H ratio | ||||||
| Acceptable (<0.85) | 11 | 85 | 45.789 | 0.000 | 1 | |
| Uacceptable (>0.85) | 92 | 76 | 8.139 (4.211–15.732) | 0.000 | ||
| Family history | ||||||
| No | 81 | 131 | 0.295 | 0.587 | 1 | |
| Yes | 22 | 30 | 1.186 (1.384–5.876) | 0.587 | ||
| F.H of other cancer | ||||||
| No | 88 | 131 | 0.273 | 0.601 | 1 | |
| Yes | 15 | 30 | 0.837 (0.429–1.632) | 0.602 | ||
| O.C | ||||||
| No | 93 | 148 | 0.211 | 0.646 | 1 | |
| Yes | 10 | 13 | 1.224 (0.516–2.905) | 0.646 | ||
| H.R.T | ||||||
| No | 98 | 158 | 1.912 | 0.167 | 1 | |
| Yes | 5 | 3 | 2.687 (0.628–11.494) | 0.183 | ||
*Odds ratios and 95% CI was calculated by logistic regression analysis