Review Article
Bilateral Hip Arthroplasty: When Is It Safe to Operate the Second Hip? A Systematic Review
Table 1
Quality assessment for observational studies.
| | Domains | Bias due to confounding | Bias in selection of participants in the study | Bias in classification of interventions | Bias due to deviations from intended intervention | Bias due to missing data | Bias in measurement of outcomes | Bias in selection of the reported result | Overall risk of bias |
| Eggli et al. 1996 | Critical | Critical | Serious | Moderate | Low | Moderate | Moderate | Critical | Alfaro-Adrián et al. 1999 | Critical | Critical | Serious | Moderate | Low | Moderate | Moderate | Critical | Parvizi et al. 2006 | Critical | Critical | Serious | Moderate | Low | Moderate | Moderate | Critical | Berend et al. 2007 | Critical | Critical | Serious | Moderate | Low | Moderate | Moderate | Critical | Hooper et al. 2009 | Critical | Critical | Moderate | Moderate | Low | Serious | Moderate | Critical | Aghayev et al. 2010 | Critical | Critical | Moderate | Moderate | Low | Moderate | Moderate | Critical | Saito et al. 2016 | Critical | Critical | Moderate | Moderate | Low | Moderate | Moderate | Critical | Johnston et al. 2011 | Critical | Critical | Moderate | Moderate | Low | Moderate | Moderate | Critical | Lindberg-Larsen et al. 2013 | Serious | Critical | Moderate | Moderate | Low | Moderate | Moderate | Serious | Rasouli et al. 2014 | Moderate | Moderate | Moderate | Moderate | Low | Moderate | Moderate | Moderate | Garland et al. 2015 | Moderate | Moderate | Moderate | Moderate | Low | Low | Low | Moderate | Quadri et al. 2015 | Critical | Critical | Serious | Moderate | Low | Serious | Moderate | Critical |
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