Table 1.
Quality index of included studies (Ferro &Speechley, 2009, amended from Downs & Black, 1998)
| Hypothesis clearly described | Main outcomes clearly described | Characteristics of patients described | Main findings clearly described | Estimates of random variability | Actual probability values used | Response rate clearly described | Patients -represent population | Patients prepared- represent population | Staff, place and facilities | Data dredging | Statistical tests appropriate | Outcome measures valid/reliable | Adjustment for confounding | Sample size or power calculation | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Anderluh et al. (2009) [35] |
1 |
1 |
1 |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
0 |
9 |
| Bewell-Weiss & Carter (2010) [36] |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
11 |
| Davis & Claridge (1998) [37] |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
11 |
| Davis & Kaptein (2006) [38] |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
11 |
| Davis et al. (1998) [2] |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
11 |
| Davis et al. (1995) [39] |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
12 |
| Holtkamp et al. (2004) [40] |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
11 |
| Naylor et al. (2011) [41] |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
12 |
| Penas-Lledo et al. (2002) [31] |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
11 |
| Shroff et al. (2006) [42] | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 13 |