Table 4.
Multivariable Survival Analyses* of All-Cause and Cancer-Specific Mortality following Cancer Diagnosis Comparing Persons with and without SSDI Entitlement to Medicare among Cases Diagnosed with Cancer Age 24–64 Years
| Comparing Persons with and without SSDI Entitlement to Medicare | |||
|---|---|---|---|
| Cancer | Stage at Diagnosis | All-Cause Mortality | Cancer-Specific Mortality |
| Lung | Overall | 1.10 (1.06, 1.14) | 1.03 (0.99, 1.07) |
| Stage I | 1.46 (1.36, 1.58) | 1.24 (1.12, 1.37) | |
| Stage II | 1.22 (1.05, 1.42) | 1.12 (0.93, 1.34) | |
| Stage III | 1.11 (1.05, 1.18) | 1.06 (0.99, 1.13) | |
| Stage IV | 0.98 (0.93, 1.03) | 0.97 (0.92, 1.03) | |
| Unstaged | 1.02 (0.92, 1.13) | 0.94 (0.84, 1.05) | |
| Colorectal | Overall | 1.44 (1.36, 1.51) | 1.11 (1.04, 1.19) |
| Stage I | 2.76 (2.42, 3.14) | 1.16 (0.85, 1.59) | |
| Stage II | 1.82 (1.62, 2.04) | 1.21 (1.01, 1.45) | |
| Stage III | 1.37 (1.24, 1.52) | 1.16 (1.02, 1.32) | |
| Stage IV | 1.05 (0.96, 1.15) | 1.04 (0.94, 1.14) | |
| Unstaged | 1.64 (1.30, 2.07) | 1.24 (0.91, 1.70) | |
| Breast | Overall | 1.81 (1.71, 1.91) | 1.28 (1.18, 1.39) |
| Stage I | 2.81 (2.51, 3.14) | 1.35 (1.06, 1.72) | |
| Stage II | 1.71 (1.57, 1.87) | 1.09 (0.95, 1.24) | |
| Stage III | 1.58 (1.36, 1.82) | 1.68 (1.43, 1.97) | |
| Stage IV | 1.39 (1.18, 1.65) | 1.46 (1.21, 1.76) | |
| Unstaged | 1.43 (1.14, 1.79) | 0.93 (0.66, 1.32) | |
| Prostate | Overall | 1.97 (1.85, 2.08) | 1.10 (0.98, 1.24) |
| Stage I | 3.02 (2.65, 3.45) | 1.37 (0.91, 2.05) | |
| Stage II | 2.44 (2.03, 2.92) | 1.32 (0.78, 2.24) | |
| Stage III | 1.88 (1.61, 2.21) | 1.37 (0.99, 1.88) | |
| Stage IV | 1.25 (1.10, 1.41) | 1.06 (0.91, 1.23) | |
| Unstaged | 2.19 (1.99, 2.42) | 0.99 (0.76, 1.27) | |
Estimates in bold are significant at p < 0.05.
Adjusted hazard ratios (aHR) < 1.00 indicate longer survival time among people with SSDI entitlement to Medicare compared with those without Medicare entitlement and aHR > 1.00 indicates shorter survival time. All aHRs are adjusted for age at diagnosis (continuous), race/ethnicity, marital status at diagnosis, geographic location (i.e., SEER tumor registry), and year of diagnosis using proportional hazards regression. Stage-specific aHRs are derived from the interaction between stage and SSDI status. Models for lung and colorectal cancer also adjusted for sex.
SSDI, Social Security Disability Insurance; SEER, Surveillance, Epidemiology, and End Results.