Table 2 The results of sub-group analyses
From: The prevalence of severe depression in Iranian older adult: a meta-analysis and meta-regression
Variables | No. studies | Prevalence% (95% CI) | I2 (%) | P value | No. participants | |
|---|---|---|---|---|---|---|
Geographical region | North | 4 | 6.5 (2.8–14.5%) | 89.5 | 0.000 | 925 |
South | 2 | 1.8 (0.1–3.4%) | 96.9 | 0.000 | 1332 | |
East | – | – | – | – | – | |
West | 3 | 8.4 (5–13.9%) | 61 | 0.000 | 513 | |
Center | 4 | 18.7 (7.6–29.1%) | 97 | 0.000 | 1178 | |
Year of publication | 2000–2006 | 2 | 2.4 (0.1–54.1%) | – | – | 1491 |
2007–2010 | 6 | 15.9 (8.2–28.6%) | 99 | 0.000 | 816 | |
> 2011 | 5 | 5.7 (3.5–9.1%) | 98.2 | 0.000 | 1641 | |
Sample size | < 200 | 6 | 14 (6.3–28.4%) | 99.5 | 0.000 | 718 |
200–400 | 5 | 7.9 (3.6–16.6%) | 96.2 | 0.000 | 1518 | |
> 400 | 2 | 1.5 (0.1–20.6%) | 0.000 | 1712 | ||