Table 5.
Pooled prevalence estimates (identification rates) of the IHN
| Study group | N | Half-bodies | PPE% (95% CI) Random |
PPE% (95% CI) Fixed |
I2 (95% CI) | Q |
|---|---|---|---|---|---|---|
| All studies | 15 | 4187 | 86.7 (78.3–93.3) | 76.3 (62.5–88.9) | 97.7 (97.1–98.2) | 609.68*** |
| Type of dissection | ||||||
| Cadaveric | 3 | 228 | 91.8 (66.8–1.00) | 99.2 (74.5–1.00) | 89.3 (70.9–96.1) | 18.68*** |
| During hernioplasty | 12 | 3959 | 84.8 (76.5–91.6) | 74.2 (61.5–86.0) | 97.4 (96.5–98.0) | 420.08*** |
| Study center | ||||||
| Monocenter | 12 | 2154 | 91.4 (83.2–97.2) | 86.6 (72.2–98.1) | 96.0 (94.5–97.2) | 227.66*** |
| Multicenter | 3 | 2033 | 64.5 (58.5–70.4) | 63.4 (57.1–69.5) | 87.1 (63.1–95.5) | 15.45*** |
| Geographic region | ||||||
| Asiaa | – | – | – | – | – | – |
| Africaa | – | – | – | – | – | – |
| Europe | 11 | 3910 | 82.3 (73.3–89.8) | 73.8 (61.2–85.5) | 97.5 (96.6–98.1) | 393.48*** |
| North America | 1 | 200 | 99.9b (99.1–100.0) | 99.9b (99.1–100.0) | NC | NC |
| South America | 3 | 77 | 92.6 (79.7–100.0) | 93.3 (79.3–100.0) | 67.8 (0.00–90.7) | 6.22* |
PPE pooled prevalence estimate, NC not computable because there was only one study in this group
*p < .05, **p < .01, ***p < .001
aThere were no studies of IHN prevalence from Asia or Africa
bFixed- and random-effects estimates are identical because the study-level prevalence rates were all 100.0% and there were was only one study