Study (first author) | Study design | Selection | Comparability | Outcome | |||||
---|---|---|---|---|---|---|---|---|---|
Representativeness of the sample | Sample size | Non-respondents | Ascertainment of exposure | Based on design and analysis | Assessment of outcome | Statistical test | |||
Gonik et al. (2000) [19] | Cross-sectional | + | + | + | |||||
Schupfner et al. (2002) [20] | Cross-sectional | + | + | + | ++ | + | + | ||
Taylor et al. (2002) [21] | Cross-sectional | + | ++ | ++ | + | ||||
Zimmerman et al. (2002) [22] | Cross-sectional | + | + | + | ++ | + | + | ||
Davis et al. (2003) [23] | Cross-sectional | + | + | + | ++ | + | + | ||
Milledge et al. (2003) [24] | Cross-sectional | + | + | + | + | ++ | + | + | |
Jungbauer-Gans et al. (2003) 1st part [25] | Cross-sectional | + | + | + | + | ||||
Jungbauer-Gans et al. (2003) 2nd part [25] | Cross-sectional | + | + | ++ | + | ||||
Wilson et al. (2004) [26] | Cross-sectional | + | + | + | + | ++ | + | + | |
Russell et al. (2004) [27] | Cross-sectional | + | + | + | + | ++ | + | + | |
Petousis-Harris et al. (2005) [28] | Cross-sectional | + | + | + | + | ||||
Clark et al. (2006) [29] | Cross-sectional | + | + | + | |||||
Davis et al. (2007) [30] | Cross-sectional | + | + | + | + | + | |||
Gust et al. (2008) [31] | Cross-sectional | + | + | ++ | + | + | |||
Goodyear-Smith et al. (2009) [32] | Cross-sectional | + | + | + | + | ++ | ++ | + | |
Study (first author) | Study design | Selection | Comparability | Exposure | |||||
Case definition adequate? | Representativeness of the cases | Selection of controls | Definition of controls | Based on design and analysis | Ascertainment of exposure | Same method for cases and controls | Non-response rate | ||
Salmon et al. (2008) [33] | Case–control | + | + | + | + | + | + |