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Unadjusted hazard ratios for overall wait times
| Year of diagnosis | Hazard ratio | 95% CI |
|---|---|---|
| 2001 | 1 | Reference |
| 2002 | 0.80 | 0.71–0.90 |
| 2003 | 0.82 | 0.72–0.93 |
| 2004 | 0.76 | 0.70–0.85 |
| 2005 | 0.70 | 0.62–0.80 |
When the year of diagnosis was considered to be the principal variable of interest, no variable modified the hazard ratios for the principal variable (year of diagnosis) by more than 10% and, hence, no other variable was included in the final model of this analysis
