Table 4.
Multivariate negative binomial regression comparing five-year total costs of treatment and treatment related complications in men who received surgery to men who received radiation therapy for treatment of localized prostate cancer
| Group | Year 1 | Year 2 | Year 3 | Year 4 | Year 5 |
|---|---|---|---|---|---|
| Entire cohort | |||||
|
| |||||
| Surgery | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Radiation therapy | 0.82 (0.8–0.84) p<0.0001) | 1.01 (0.95–1.07) p=0.76 | 1.17 (1.1–1.25) p<0.0001 | 1.29 (1.2–1.37) p<0.0001 | 1.30 (1.21–1.39) p<0.0001 |
| Men aged 55–65 and ADG ≤5 | |||||
| Surgery | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Radiation therapy | 0.88 (0.84–0.91) p<0.0001 | 0.96 (0.88–1.04) p=0.31 | 0.91 (0.83–1.00) p=0.04 | 1.5 (1.33–1.62) p<0.0001 | 1.4 (1.29–1.6) p<0.0001 |
| Men aged >65 years | |||||
| Surgery | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Radiation therapy | 0.81 (0.79–0.84) p<0.0001 | 1.11 (1.04–1.18) p<0.0001 | 1.44 (1.35–1.54) p<0.0001 | 1.28 (1.19–1.38) p<0.0001 | 1.28 (1.18–1.38) p<0.0001 |
Data are relative rates (RR), (95% confidence interval [CI]). Multivariate model also includes age, comorbidity (aggregated diagnosis groups [ADG] case mix), year of treatment, and income. ADG: aggregated diagnosis groups.