Table 5 Level of evidence according to Oxford Centre for Evidence-Based Medicine
From: Systematic literature review on surgical site preparation in paediatric surgery
Study | Design | Level of evidence |
|---|---|---|
Lubega et al. (2017) [37] | Prospective cohort study | 4 |
Chang et al. (2011) | Prospective cohort study | 4 |
Rojo et al. (2012) [35] | Retrospective case–control study | 3b |
Bashyal et al. (2009) [34] | Retrospective cohort study | 4 |
Mc Cray et al. (1986) [33] | Retrospective case–control study | 4 |
Bucher et al. (2011) [42] | Retrospective case–control study | 3b |
Meier et al. (2001) [38] | Randomized controled trial | 2b |
Berry et al. (1982) [31] | Randomized controled trial | 2b |