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Relative risk and 95% confidence intervals (CI) from a Cox proportional hazards model for prostate cancer death among 18,837 men who underwent radical prostatectomy in Sweden, 1988–2008
| Patient Characteristic |
Relative risk | 95% CI | P for trend |
|---|---|---|---|
| Calendar time | |||
| 1988–1992 | 1·00 | Ref | <0·001 |
| 1993–1997 | 0·75 | (0·64–0·89) | |
| 1998–2002 | 0·42 | (0·34–0·51) | |
| 2003–2008 | 0·33 | (0·25–0·42) | |
| Age group | |||
| <55 years | 1·00 | Ref | <0·001 |
| 55–64 | 0·98 | (0·75–1·28) | |
| 65–74 | 1·62 | (1·24–2·12) | |
| 75 and older | 12·94 | (9·52–17·59) |
