Table 8.
Estimate of total incidence of Gram-negative bacilli with stratification on prospective nature of cohort and latitude of the study place using the random-effect model
| Subdivision | n | Incidence (95% CI) | τ2 | I2 (%) | P-valuea |
|---|---|---|---|---|---|
| All studies | 63 | 0.0024 (0.0018–0.0032) | 0.9819 | 91.8 | |
| Prospective cohort design | |||||
| Yes | 35 | 0.0058 (0.0053–0.0063) | 0.8591 | 91.9 | 0.0001 |
| No/Unclear | 30 | 0.0039 (0.0034–0.0043) | 1.2000 | 91.4 | |
| Latitude over median 40° | |||||
| Yes | 32 | 0.0018 (0.0012–0.0025) | 0.6549 | 87.4 | 0.008 |
| No | 31 | 0.0036 (0.0024–0.0054) | 1.046 | 92.4 | |
Note:
a
Test for subgroup differences using the random-effect model between groups with Q statistics, df =1, and P-value.
Abbreviations: CI, confidence interval; τ2, interstudy variability; df, degree of freedom.