Table 2 Quality assessment of epidemiological studies included
From: The prevalence and burden of subthreshold generalized anxiety disorder: a systematic review
Criterion | Unbiased random population sample | Adequate sample size (>1000) | Adequate response rate (>70%) | Analysis of non-respondents | Reliable and valid assessment of GAD | Total quality score (max. 5) |
|---|---|---|---|---|---|---|
Angst, 2006 [43] | 1 | 1a | 0b | 1b | 1 | 4 |
Beesdo, 2009 [44] | 1 | 1 | 1 | 1e | 1 | 5 |
Bienvenu, 1998 [45] | 1 | 1 | 0 | 1c | 1 | 4 |
Carter, 2001 [46] | 1 | 1 | 1 | 1 | 1 | 5 |
Grenier, 2011 [47] | 1 | 1 | 0 | 0 | 1 | 3 |
Heun, 2000 [48] | 0 | 0 | 0 | 1d | 1 | 2 |
Hoyer, 2002 [49] | 1 | 1 | 0 | 0 | 1 | 3 |
Kertz, 2011 [50] | 0 | 0 | 0 | 1 | 1 | 2 |
Kessler, 2005 [51] | 1 | 1 | 1 | 1f | 1 | 5 |
Maier, 2000 [52] | 1g | 1g | 1g | 0g | 1 | 4 |
Olfson, 1996 [53] | 1 | 1 | 0 | 1 | 1 | 4 |
Potvin, 2011 [54] | 1 | 1 | 1 | 1 | 1 | 5 |
Rucci, 2003 [55] | 1 | 0 | 0 | 1 | 1 | 3 |
Ruscio, 2007 [56] | 1 | 1 | 1 | 1f | 1 | 5 |
Szadoczky, 2004 [57] | 1 | 1 | 1 | 0 | 1 | 4 |
Weiller, 1998 [58] | 1 | 1 | 0 | 0 | 1 | 3 |
Wetherell, 2003 [59] | 0 | 0 | 0 | 0 | 1 | 1 |
Wittchen, 2002 [60] | 1 | 1 | 1 | 1 | 0 | 4 |