Table 3 Adjusted 1 relative risk estimates of receiving BCS rather than mastectomy
Adjusted1relative risk estimates (95% confidence intervals) | |||
|---|---|---|---|
Stage I | Stage II | Stage III | |
Age at diagnosis | P < 0.001 | P < 0.001 | P < 0.001 |
<50 | 1.00 | 1.00 | 1.00 |
50-59 | 1.08 (1.02, 1.14) | 1.03 (0.95, 1.13) | 1.10 (0.86, 1.39) |
60-69 | 1.01 (0.95, 1.07) | 0.94 (0.86, 1.03) | 0.95 (0.72, 1.24) |
70-79 | 0.87 (0.81, 0.93) | 0.71 (0.63, 0.80) | 0.53 (0.35, 0.77) |
≥80 | 0.87 (0.79, 0.95) | 0.62 (0.53, 0.73) | 0.63 (0.41, 0.92) |
Geography of surgery | P < 0.001 | P < 0.001 | P = 0.30 |
Calgary | 1.00 | 1.00 | 1.00 |
South | 0.83 (0.76, 0.90) | 0.74 (0.63, 0.85) | 0.92 (0.61, 1.32) |
Central | 0.65 (0.57, 0.72) | 0.58 (0.49, 0.68) | 0.62 (0.37, 0.95) |
Edmonton | 0.96 (0.92, 1.00) | 0.91 (0.85, 0.98) | 0.95 (0.77, 1.18) |
North | 0.88 (0.77, 0.99) | 0.72 (0.58, 0.88) | 0.95 (0.57, 1.45) |
Year of diagnosis | P = 0.24 | P = 0.40 | P = 0.99 |
2002-2004 | 1.00 | 1.00 | 1.00 |
2005-2007 | 1.02 (0.97, 1.08) | 1.02 (0.94, 1.11) | 1.02 (0.80, 1.31) |
2008-2010 | 1.04 (0.99, 1.09) | 1.06 (0.97, 1.15) | 1.02 (0.79, 1.31) |
ER/PR status | P = 0.11 | P = 0.34 | P = 0.44 |
Positive | 1.00 | 1.00 | 1.00 |
Negative | 0.96 (0.90, 1.01) | 0.96 (0.88, 1.04) | 0.91 (0.70, 1.15) |
Neo-adjuvant chemotherapy | P < 0.001 | P < 0.001 | P < 0.001 |
Not Received | 1.00 | 1.00 | 1.00 |
Received | 0.32 (0.15, 0.57) | 0.57 (0.45, 0.70) | 0.31 (0.21, 0.45) |