a trend toward significanceP = 0.09
These poorer survivals, however, were not seen upon subgroup analysis, although there was a trend toward significance within the mastectomy-only multivariate analysis for poorer OS (HR 1.35, 95% CI 0.95–1.91; P = 0.09) and DSS (HR 1.45, 95% CI 0.96–2.21; P = 0.08).