Incident rate ratios (IRRs) and 95% confidence intervals of post-discharge frequency of outpatient antimicrobial and corticosteroid prescriptions after 1–2 propensity score (PS) matching and stabilised inverse probability weighting (IPTW) in the inhaled corticosteroid (ICS) withdrawal group versus the control group
| Observation period | Prescription | IRR (95% CI) | p-value | |
| 1–2 PS matching | 30 days | Antimicrobials | 0.94 (0.73–1.23) | 0.668 |
| Corticosteroids | 0.97 (0.72–1.31) | 0.856 | ||
| 1 year | Antimicrobials | 0.78 (0.63–0.98) | 0.029 | |
| Corticosteroids | 0.78 (0.60–1.02) | 0.067 | ||
| Stabilised IPTW | 30 days | Antimicrobials | 0.90 (0.63–1.31) | 0.598 |
| Corticosteroids | 1.06 (0.76–1.47) | 0.733 | ||
| 1 year | Antimicrobials | 0.65 (0.51–0.83) | 0.001 | |
| Corticosteroids | 0.76 (0.56–1.02) | 0.065 |