Table 1 Study design according to SIGN classifying algorithm and SIGN quality of evidence scale
From: Social, economic, and health impact of the respiratory syncytial virus: a systematic search
| Study design and quality of evidence | N | % | References |
|---|---|---|---|
| Systematic review or Meta-analyses | 21 | 23.6 | |
| ?High quality | 8 | [40],[42],[46],[61],[62],[65],[71],[72] | |
| ?Acceptable | 13 | [18],[19],[28],[33],[41],[43],[50],[64],[67],[73]-[76] | |
| Economic evaluation | 6 | 6.7 | |
| ?High quality | 6 | [55],[57]-[60],[63] | |
| ?Acceptable | 0 | ||
| Controlled trial | 4 | 4.5 | |
| ?High quality | 4 | [52],[77],[78],[106] | |
| ?Acceptable | 0 | ||
| Cohort studies | 18 | 20.2 | |
| ?High quality | 11 | [45],[69],[86],[87],[89],[90],[93]-[95],[97],[105] | |
| ?Acceptable | 7 | [44],[85],[88],[91],[100],[102],[103] | |
| Case-control study | 5 | 5.6 | |
| ?High quality | 3 | [47],[79],[92] | |
| ?Acceptable | 2 | [39],[99] | |
| Cross-sectional study* | 35 | 39.8 | [20]-[27],[29]-[32],[34]-[38],[48],[49],[51],[53],[54],[56],[66],[68],[70],[80]-[84],[96],[98],[101],[104] |
| Total | 89 | 100 |