Table 2. Quality assessment of the included studies.
| Author | H | S | A/G | IC | EC | T | MO | SS | SSJ | CG | RA | MRA | B | E | ECL | SM | FR | FR80% | LF | M | AN | CI | AE | C | %* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Abbreviations: A/G, age/gender distribution described; AE, adverse events stated; AN, results stated in absolute numbers; B, blinding performed; C, conclusions stated; CG, use of control group; CI, confidence intervals stated; E, more than one examiner for outcome assessment; EC, exclusion criteria; ECL, examiner calibration; FR, follow-up rate mentioned; FR80%, follow-up rate greater than 80%; H, hypothesis/aim described; IC, inclusion criteria; LF, lost to follow-up; M, main outcomes clearly described; MO, main outcomes to be measured; MRA, method of random allocation described; RA, random allocation to treatment used; S, study setting described; SM, statistical methods described; SS, sample size; SSJ, sample size justified; T, treatment described; x, yes. *% of questions answered yes. | |||||||||||||||||||||||||
| Olley et al (2018) 38 | x | x | – | x | x | x | x | x | x | – | x | x | x | x | x | x | – | x | x | x | x | – | – | x | 79 |
| Layton & Walton (2012) 36 | x | x | x | x | x | x | x | x | x | x | x | x | – | x | x | x | x | x | x | x | x | – | – | x | 87 |
| Beier et al (2012) 39 | x | x | x | x | x | x | x | x | x | x | x | x | – | x | x | x | x | x | x | x | x | – | – | x | 87 |
| Layton & Walton (2007) 35 | x | x | – | x | x | x | – | x | x | – | x | x | – | – | x | x | – | x | x | x | – | – | – | x | 62 |
| Friedman (1998) 34 | x | x | – | x | x | x | – | x | x | – | x | – | – | – | x | x | – | x | x | x | – | – | – | x | 58 |
| Gurel et al (2013) 29 | x | x | – | x | x | x | x | x | x | – | x | x | x | x | x | x | – | x | x | x | x | – | – | x | 79 |
| Fradeani et al (2005) 4 | x | x | – | x | x | x | – | x | x | – | x | x | x | x | x | x | – | x | x | x | x | – | – | x | 75 |
| Granell-Ruiz et al (2009) 30 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | – | – | x | 92 |
| Dumfahrt & Schäffer (2000) 31 | x | x | – | x | x | x | – | x | x | – | x | x | – | – | x | x | – | x | x | x | – | – | – | x | 67 |
| Burke & Lucarotti (2009) 32 | x | x | – | x | x | x | x | x | x | – | x | x | – | x | x | x | – | x | x | x | x | – | – | x | 75 |
| Peumans et al (2004) 33 | x | x | – | x | x | x | x | x | x | – | x | x | x | x | x | x | – | x | x | x | x | – | – | x | 79 |
| D’Arcangelo et al (2012) 18 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | – | – | x | 92 |
| Shao-Ping et al (2012) 19 | x | x | – | x | x | x | x | x | x | – | x | x | – | x | x | x | – | x | x | x | x | – | – | x | 75 |
| Smales & Etemadi (2004) 20 | x | x | – | x | x | x | x | x | x | – | x | x | – | x | x | x | – | x | – | x | x | – | – | x | 71 |
| Magne et al (2000) 21 | x | x | x | x | x | x | – | x | x | x | x | x | – | – | x | x | x | x | x | x | – | – | – | x | 75 |
| Shaini et al (1997) 22 | x | x | x | x | – | x | – | x | x | x | x | x | – | – | x | x | x | x | x | x | – | – | – | x | 77 |
| Fradeani (1998) 23 | x | x | – | x | x | x | – | x | x | – | x | x | – | – | x | x | – | x | x | x | – | – | – | x | 62 |
| Aykor & Ozel (2009) 24 | x | x | – | x | x | x | x | x | x | – | x | x | – | x | x | x | – | x | x | x | x | – | x | x | 79 |
| Guess & Stappert (2008) 25 | x | x | – | x | x | x | x | x | x | – | x | x | x | x | x | x | – | x | x | x | x | – | x | x | 83 |
| Murphy et al (2005) 26 | x | x | x | x | x | x | – | x | x | x | x | x | – | – | x | x | x | x | x | x | – | – | – | x | 75 |
| Aristidis & Dimitra (2002) 27 | x | x | x | x | x | x | x | x | x | x | x | x | – | x | x | x | x | x | x | x | x | – | – | x | 87 |
| Peumans et al (1998) 28 | x | x | – | x | x | x | – | x | x | – | x | x | – | – | x | x | – | x | x | x | – | – | – | x | 62 |
| Coelho-de-Souza et al (2015) 10 | x | x | x | x | x | x | – | x | x | x | x | x | x | – | x | x | x | x | x | x | – | – | – | x | 79 |
| Fabbri et al (2014) 11 | x | x | x | – | x | x | – | x | x | x | x | x | – | – | x | x | x | x | x | x | – | – | x | x | 75 |
| Gresnigt et al (2013) 12 | x | x | x | x | x | x | – | x | x | x | x | x | x | – | x | x | x | x | x | x | – | – | – | x | 79 |
| Rinke et al (2013) 13 | x | x | x | x | x | x | x | x | x | x | x | x | – | x | x | x | x | x | x | x | x | – | – | x | 87 |
| Nordbø et al (1994) 14 | x | x | – | x | x | x | x | x | x | – | x | x | – | x | x | x | – | x | x | x | x | – | – | x | 75 |
| Karagözoğlu et. al. (2016) 15 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | – | x | x | 96 |
| Öztürk & Bolay (2014) 16 | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | x | – | – | x | 83 |
| Çötert et al (2009) 17 | x | x | x | x | x | x | x | x | x | x | x | x | – | x | x | x | x | x | x | x | x | – | – | x | 87 |