The association of waiting times from diagnosis to surgery with survival in women with localised breast cancer in England
Menée en Angleterre à partir des données portant sur 53 689 femmes diagnostiquées avec un cancer du sein localisé entre 1996 et 2009, cette étude analyse l'impact, sur la survie des patientes, du délai entre le moment du diagnostic et l'intervention chirurgicale
Background: Survival from breast cancer in the United Kingdom is lower than in other developed countries. It is unclear to what extent waiting times for curative surgery affect survival. Methods: Using national databases for England (cancer registries, Hospital Episode Statistics and Office of National Statistics), we identified 53 689 women with localised breast cancer, aged 15 years, diagnosed between 1996 and 2009, who had surgical resection with curative intent within 62 days of diagnosis. We used relative survival and excess risk modelling to determine associations between waiting times and 5-year survival. Results: The median diagnosis to curative surgery waiting time among breast cancer patients was 22 days (interquartile range (IQR): 15–30). Relative survival was similar among women waiting between 25 and 38 days (RS: 93.5%; 95% CI: 92.8–94.2%), <25 days (RS: 93.0%; 95% CI: 92.5–93.4%) and between 39 and 62 days (RS: 92.1%; 95% CI: 90.8–93.4%). There was little evidence of an increase in excess mortality with longer waiting times (excess hazard ratio (EHR): 1.06; 95% CI: 0.88–1.27 comparing waiting times 39-62 with 25–38 days). Excess mortality was associated with age (EHR 65–74 vs 15–44 year olds: 1.23; 95% CI: 1.07–1.41) and deprivation (EHR most vs least deprived: 1.28; 95% CI: 1.09–1.49), but waiting times did not explain these differences. Conclusion: Within 62 days of diagnosis, decreasing waiting times from diagnosis to surgery had little impact on survival from localised breast cancer.