Respiratory events and death within 12 months follow-up in the matched cohort (n=10 860)
| N (column %) | Concomitant users (n=1810) | Opioid only users (n=9050) | Total (n=10 860) |
| Respiratory events without death | 319 (17.6%) | 1466 (16.2%) | 1785 (16.8%) |
| Respiratory events with death | 53 (2.9%) | 244 (2.7%) | 297 (2.7%) |
| Death without respiratory events | 59 (3.3%) | 296 (3.3%) | 355 (3.3%) |
Respiratory events=COPD exacerbation or respiratory depression.
COPD, chronic obstructive pulmonary disease.