We examined how sociodemographic, clinical and area-level factors are related to short-term prostate cancer mortality versus mortality from other causes, a crucial distinction for this disease that disproportionately affects men older than 60 years.
We applied competing risk survival models to administrative data from the Queensland Cancer Registry (Australia) for men diagnosed with prostate cancer between January 2005 and July 2007, including stratification by Gleason score.
The men (n = 7393) in the study cohort had a median follow-up of 5 years 3 months. After adjustment, remoteness and area-level disadvantage were not significantly associated with prostate cancer mortality. However, area-level disadvantage had a significant negative relationship with hazard of death from a cause other than prostate cancer within 7 years; compared with those living in the most advantaged areas, the likelihood of mortality was higher for those in the most disadvantaged (subhazard ratio [SHR] = 1.39; 95% CI, 1.01-1.90; P = 0.041), disadvantaged (SHR = 1.51; 95% CI, 1.14-2.00; P = 0.004), middle (SHR = 1.34; 95% CI, 1.02-1.75; P = 0.034) and advantaged areas (SHR = 1.44; 95% CI, 1.09-1.89; P = 0.009). Those with Gleason score of 7 and higher had a lower hazard of prostate cancer mortality if they were living with a partner, whereas those with lower Gleason scores and living a partner had lower hazards of other-cause mortality.
Understanding why men living in more disadvantaged areas have higher risk of non-prostate cancer mortality should be a priority.
Asia-Pacific journal of clinical oncology. 2016 Aug 25 [Epub ahead of print]
Audrey A Thomas, Alison Pearce, Linda Sharp, Robert Alexander Gardiner, Suzanne Chambers, Joanne Aitken, Michal Molcho, Peter Baade
Health Promotion Research Centre, National University of Ireland, Galway, Ireland., National Cancer Registry, Ireland., Institute of Health and Society, Newcastle University, United Kingdom., School of Medicine University of Queensland, Australia., Menzies Health Institute Queensland, Griffith University, Gold Coast, Australia., Cancer Council Queensland, Brisbane, Australia., Department of Health Promotion, National University of Ireland, Galway, Ireland.