Table 5. Odds ratios (ORs) for TNM classes in premenopausal ductal carcinoma by reproductive factors.
| Reproductive factors | T1 | Tis* vr. T1 | T2–T4** vr. T1 | N0 | N1–N3 vr. N0 | M0 | M1 vr. M0 | |||||||||
| N | N | OR (95%CI) | P | N | OR (95%CI) | P | N | N | OR (95%CI) | P | N | N | OR (95%CI) | P | ||
| Parity1 | ||||||||||||||||
| 1 (Ref.) | 280 | 5 | 1.00 | 207 | 1.00 | 330 | 174 | 1.00 | 392 | 8 | 1.00 | |||||
| 0 | 235 | 8 | 1.79 (0.57–5.59) | 0.32 | 252 | 1.44 (1.11–1.85) | –0.01 | 343 | 180 | 0.99 (0.76–1.28) | 0.93 | 408 | 14 | 1.67 (0.69–4.04) | 0.26 | |
| 2 | 830 | 24 | 1.67 (0.63–4.45) | 0.30 | 528 | 0.86 (0.70–1.06) | 0.16 | 949 | 481 | 0.97 (0.78–1.20) | 0.76 | 1,079 | 33 | 1.46 (0.67–3.19) | 0.35 | |
| 3 | 358 | 8 | 1.39 (0.45–4.36) | 0.57 | 245 | 0.94 (0.73–1.20) | 0.59 | 393 | 235 | 1.14 (0.89–1.46) | 0.30 | 488 | 8 | 0.77 (0.28–2.09) | 0.61 | |
| ≥4 | 100 | 2 | 1.33 (0.25–7.11) | 0.74 | 56 | 0.77 (0.53–1.13) | 0.18 | 108 | 58 | 1.04 (0.72–1.52) | 0.83 | 131 | 2 | 0.75 (0.15–3.62) | 0.72 | |
| Total | 1,803 | 47 | 1,288 | 2,123 | 1,128 | 2,498 | 65 | |||||||||
Bold type: 95% CI does not include 1.00. The ORs were adjusted for:
1. Age at diagnosis, region, and occupation.
2. Age at diagnosis, region, occupation, and parity.
*
Carcinoma in situ.
**
The number of cases for T2 (N = 1,047), T3 (176), and T4 (65).