Factors significantly (p<0.05) associated, on multivariate analysis, with asthma relapse within 4 weeks of ED treatment (✓), factors studied but not found to be significant (ø) and factors not assessed (NA)
| Rowe 2007 | Emerman 1999 | Singh 1999 | Rowe 2008 | Rowe 2015 | Lin 2009 | Prabhakaran 2013 | Baibergenova 2006 | Withy 2008 | |
|---|---|---|---|---|---|---|---|---|---|
| Female sex | ✓ (7.2, 2.3 to 23.1) | NA | ø | ✓ (1.57, 1.14 to 2.09) | ✓ (1.9, 1.2 to 3.0) | NA | NA | ✓ (1.23, 1.10 to 1.37) | ✓ (1.17, 1.03 to 1.34) |
| Older age | ø | NA | NA | ø | ø | NA | ✓ (0.98, 0.97 to 1.0) | ✓ (0.81, 0.69 to 0.94) | Ø |
| Past healthcare usage | NA | ✓ (1.3, 1.1 to 1.5) | NA | ✓ (1.47, 1.18 to 1.80) | ø | ø | NA | NA | NA |
| Severity | NA | NA | NA | ø | ø | ø | NA | ✓ (2.51, 1.12 to 5.62) | NA |
| Symptom duration | NA | ✓ (2.5, 1.2 to 5.2) | NA | ø | ✓ (1.7, 1.3 to 2.3) | NA | NA | NA | NA |
| ICS at presentation | ✓ (3.1, 1.0 to 9.8) | NA | NA | ✓ (1.39, 1.07 to 1.78) | ✓ (1.9, 1.1 to 3.2) | NA | NA | NA | NA |
| Cost/insurance | NA | NA | NA | ø | ø | NA | NA | NA | ✓ (1.15, 1.0 to 1.32) |
ED, emergency department; ICS, inhaled corticosteroids.