Table 3 Subgroup analysis of suicidal ideation and suicidal attempt by study population, sample size, setting, publication year, tool and time frame
Subgroup | Suicidal ideation | Suicidal attempt | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
No. of studies | Pooled prevalence | 95% CI | I2 | p-value | No. of studies | Pooled prevalence | 95% CI | I2 | p-value | |
Sample size | ||||||||||
 Small (< median) | 5 | 9 | 2–19 | 98.99% | < 0.001 | 4 | 5 | 1–11 | 91.16% | < 0.001 |
 Large (≥ median) | 7 | 10 | 3–19 | 99.80% | < 0.001 | 6 | 3 | 2–5 | 98.47% | < 0.001 |
Study setting | ||||||||||
 SNNP | 5 | 14 | 2–32 | 99.78% | < 0.001 | 5 | 5 | 2–8 | 98.74% | < 0.001 |
 Oromia | 2 | 11 | 10–13 | – | – | 2 | 4 | 3–5 | – | – |
 Addis Ababa | 2 | 3 | 2–3 | – | – | 2 | 3 | 2–3 | – | – |
 Harar | 1 | 5 | 4–6 | – | – | 1 | 2 | 1–3 | – | – |
 Tigray | 1 | 5 | 3–8 | – | – | – | – | – | – | – |
Publication year | ||||||||||
 1999–2010 | 4 | 19 | 5–39 | 99.89% | < 0.001 | 5 | 5 | 2–8 | 99.86% | < 0.001 |
 2011–2020 | 8 | 6 | 3–9 | 97.86% | < 0.001 | 5 | 4 | 2–6 | 97.58% | < 0.001 |
Quality of studies | ||||||||||
 High | 9 | 14 | 6–26 | 99.79% | < 0.001 | 8 | 5 | 3–7 | 96.14% | < 0.001 |
 Low | 3 | 4 | 2–8 | 96.76% | < 0.001 | 2 | 2 | 1–3 | – | – |
Tool | ||||||||||
 CIDI | 7 | 14 | 4–30 | 99.68% | < 0.001 | 7 | 4 | 1–8 | 97.86% | < 0.001 |
 SRQ-20 | 5 | 4 | 3–6 | 95.54% | < 0.001 | – | – | – | – | – |
 SRB-R | – | – | – | – | – | 1 | 3 | 2–4 | – | – |
Timeframe | ||||||||||
 12–month | 12 |  |  |  |  | 7 | 4 | 1–8 |  |  |
 Lifetime | – | – | – | – | – | 3 | 4 | 3–6 | 97.86% | < 0.001 |