Table 2 Subgroup analysis of patients with traumatic chest injuries based on country, study design, and publication year across sub-Saharan Africa
| Â | Variables | Response | number of studies | Pooled mortality with 95% CI | I2 (p-value) |
|---|---|---|---|---|---|
1 | Country | Ethiopia | 4 | 15.76% (95% CI: 4.62, 26.90) | 97.12% (< 0.001) |
Nigeria | 9 | 4.46% (95% CI: 2.52, 6.41) | 75.62% (< 0.001) | ||
Tanzania | 3 | 15.84% (95% CI: 0.83, 30.86) | 94.86% (< 0.001) | ||
South Africa | 2 | 9.11% (95% CI: 3.23, 21.45) | 87.81% (< 0.001) | ||
Cameroon | 1 | 7.6% (4.84, 10.36) | - | ||
Senegal | 1 | 16.20% (95% CI: 10.80, 21.59) | - | ||
Sudan | 1 | 2.10% (95% CI: 0.19, 4.39) | - | ||
2 | Study design | Cross-sectional | 13 | 10.65% (95% CI: 6.38, 14.92) | 95.43% (< 0.001) |
cohort | 8 | 6.04% (95% CI: 3.36, 8.71) | 81.18% (< 0.001) | ||
3 | Publication year | 1981–2015 | 13 | 7.27% (95% CI: 4.81, 9.73) | 84.01% (< 0.001) |
|  |  | 2016 − 223 | 8 | 11.50% (95% CI: 5.28, 17.72) | 96.82% (< 0.001) |