Table 4. Odds Ratio of Survival (i.e., No Opioid Use).
Class Comparison | OR (95% CI) | z | p |
---|---|---|---|
Class 1 to Class 2 | 0.37 (95% CI: 0.26-0.52) | -5.74 | <0.001 |
Class 1 to Class 3 | 0.35 (95% CI: 0.27-0.45) | -8.15 | <0.001 |
Class 1 to Class 4 | 0.74 (95% CI: 0.55-1.00) | -1.98 | <0.05 |
Note. Class 1 is the reference group for all comparisons. Class 1 was used as the reference group because members of this class overall used opioids earliest. These odds ratios were generated by discrete survival analysis at each time point and they give the odds of opioid use occurring.