Table 2 Quality Score for 15 Studies According to Threats to Validity and Overall Score
From: Gestational weight gain and group prenatal care: a systematic review and meta-analysis
Author, Year | Threats to validity a | Total | ||||
|---|---|---|---|---|---|---|
Reporting (11) | External validity (3) | Internal validity (7) | Confounding or selection bias (6) | Power (1) | ||
Randomized trials | ||||||
Kennedy 2011 [29] | 9 | 2 | 3 | 5 | 0 | 19 |
Harden 2014 [22] | 5 | 0 | 2 | 2 | 0 | 9 |
Magriples 2015 [25] | 9 | 1 | 2 | 5 | 0 | 17 |
Cohort studies | ||||||
Klima 2009 [26] | 6 | 1 | 3 | 2 | 0 | 12 |
Holbrook 2010 [31] | 3 | 1 | 3 | 2 | 0 | 9 |
Trudnak 2013 [27] | 7 | 1 | 4 | 2 | 0 | 14 |
Tanner-Smith 2014 [35] | 8 | 1 | 4 | 3 | 0 | 16 |
Zielinski 2014 [34] | 8 | 2 | 0 | 2 | 0 | 12 |
Walton 2015 [28] | 7 | 2 | 1 | 2 | 0 | 12 |
Trotman 2015 [24] | 6 | 2 | 2 | 2 | 0 | 12 |
Mazzoni 2015 [23] | 8 | 1 | 3 | 2 | 0 | 14 |
Brumley 2016 [36] | 7 | 0 | 3 | 2 | 0 | 12 |
O’Donnell 2016 [32] | 8 | 1 | 4 | 3 | 0 | 16 |
Schellinger 2016 [30] | 5 | 1 | 2 | 2 | 0 | 10 |
Kominiarek 2017 [33] | 9 | 1 | 4 | 3 | 0 | 17 |