Table III.
Pooled prevalence estimates along with 95% confidence intervals of endometriosis by stage of disease, diagnostic method and continent
| Subgroups | Number of studies | Prevalence estimate (%) (95% CI) | Between subgroups | Between groups | ||
|---|---|---|---|---|---|---|
|
|
|
|||||
| I2 (%) | P heterogeneity | Q | P heterogeneity | |||
| Stages | ||||||
| 1 | 9 | 20 (11-28) | 99.10 | 0.001 | 16.44 | 0.001 |
| 2 | 8 | 13 (7-18) | 99.60 | 0.001 | ||
| 3 | 7 | 5 (2-8) | 97.00 | 0.001 | ||
| 4 | 5 | 2 (1-4) | 84.30 | 0.001 | ||
| Clinical symptoms | ||||||
| Infertility | 5 | 31 (15-48) | 99.10 | 0.001 | 20.21 | 0.001 |
| Chronic pelvic pain | 4 | 42 (25-58) | 99.20 | 0.001 | ||
| Asymptomatic women | 9 | 23 (19-26) | 99.00 | 0.001 | ||
| Ovarian malignancy | 1 | - | - | - | ||
| Diagnostic method | ||||||
| Laparoscopy | 12 | 20 (17-22) | 99.70 | 0.001 | 13.23 | 0.001 |
| Other (ultrasound or MRI or histopathology) | 3 | 12 (3-21) | 92.80 | 0.001 | ||
| Laparoscopy, ultrasound and MRI | 2 | 31 (25-37) | 96.50 | 0.001 | ||
| Total | 17 | 18 (16-20) | 99.60 | 0.001 | ||
| Continent | ||||||
| Europe | 8 | 17 (12-21) | 98.20 | 0.001 | 17.98 | 0.001 |
| Americas | 3 | 19 (3-36) | 99.60 | 0.001 | ||
| Asia | 3 | 36 (5-69) | 96.10 | 0.001 | ||
| Africa | 3 | 26 (14-38) | 98.20 | 0.001 | ||
| Total | 17 | 18 (16-20) | 99.60 | 0.001 | ||
| Sample size | ||||||
| <1000 | 13 | 28 (19-37) | 99.00 | 0.001 | 19.09 | 0.001 |
| >1000 | 4 | 7 (3-11) | 99.90 | 0.001 | ||
| Total | 17 | 18 (16-20) | 99.60 | 0.001 | ||
*P<0.05. MRI, magnetic resonance imaging; CI, confidence interval