Subgroups | No. of studies | HR (95% CI) | I2 (P value) |
---|---|---|---|
Population | |||
Adult | 4 | 1.15 (0.86–1.53) | 0 (0.73) |
Children | 3 | 2.40 (1.49–3.89) | 37.7% (0.20) |
Mixed adult and children | 3 | 3.06 (1.98–4.70) | 32.1% (0.23) |
Design | |||
Prospective | 6 | 1.68 (1.02–2.77) | 60.1% (0.03) |
Retrospective | 4 | 2.37 (1.55–3.63) | 64.8% (0.04) |
Region | |||
Europe | 5 | 2.05 (1.10–3.80) | 83.0% (< 0.01) |
USA | 3 | 2.10 (1.50–2.94) | 1.8% (0.36) |
Asia | 2 | 1.89 (0.99–3.62) | 0 (0.32) |
Detection method | |||
PCR | 6 | 1.65 (1.07–2.55) | 61.5% (0.02) |
FC | 4 | 2.53 (1.58–4.04) | 58.1% (0.07) |
Adjustment | |||
Adjusted | 4 | 2.58 (1.27–5.26) | 71.1% (0.02) |
Crude | 6 | 1.70 (1.18–2.44) | 58.7% (0.03) |