Type of study | Studies Included | Ref | Range | Mean | Median |
---|---|---|---|---|---|
Current review | |||||
Longitudinal | 6 | 19–24 | 8.6%–44% | 19.3% | 16.3% |
Case-control | 3 | 26–29 | 9.5%–21.4% | 14.8% | 13.5% |
Cross-sectional | 7 | 31–37 | 7.0%–31.3% | 16.1% | 13.6% |
Current and earlier review | |||||
Longitudinal | 6 | 19–24 | 8.6%–44.0% | 19.3% | 16.3% |
Case-control | 6 | 26–29, 41–43 | 9.5%–36.0% | 20.7% | 12.2% |
Cross-sectional | 14 | 31–37, 44–51 | 7%–51% | 21.2% | 17.6% |
All | 26 | See above | 7%–51% | 20.7% | 17.6% |
All, adult-onset asthma only | 17 | 19–24, 26, 28–31, 34–36, 42, 43, 45 | 8.6%–44.0% | 18.8.5% | 16.9% |