Table 2 Quality assessment of the eligible studies
From: Simultaneous versus staged bilateral total hip arthroplasty: a systematic review and meta-analysis
Author | Year | Study type | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias |
|---|---|---|---|---|---|---|---|---|---|
Bhan et al. | 2006 | Randomized clinical trial | Yes | Unclear | Unclear | Yes | Yes | Yes | No bias |
Taheriazam et al. | 2019 | Randomized clinical trial | Yes | Yes | Unclear | Yes | Yes | Unclear | No bias |
|  |  |  | Newcastle–Ottawa Scale (NOS) | |||
|---|---|---|---|---|---|---|
Selection | Comparability | Exposure/Outcome | Total score | |||
Agarwal et al. | 2016 | Retrospective cohort | 3 | 1 | 2 | 6 |
Aghayev et al. | 2010 | Registry | 3 | 1 | 2 | 6 |
Alfaro-Adrián et al. | 1999 | Retrospective cohort | 3 | 1 | 2 | 6 |
Berend et al. | 2007 | Retrospective cohort | 3 | 1 | 2 | 6 |
Brown et al. | 2017 | Retrospective cohort | 3 | 2 | 1 | 6 |
Calabro et al. | 2020 | Registry | 3 | 2 | 2 | 7 |
Eggli et al. | 1995 | Prospective cohort | 3 | 2 | 2 | 7 |
Garland et al. | 2015 | Registry | 3 | 1 | 2 | 6 |
Goh et al. | 2022 | Retrospective cohort | 3 | 1 | 1 | 5 |
Guo et al. | 2020 | Retrospective cohort | 3 | 1 | 2 | 6 |
Hooper et al. | 2009 | Registry | 3 | 1 | 2 | 6 |
Hou et al. | 2021 | Retrospective case control | 3 | 1 | 2 | 6 |
Houdek et al. | 2017 | Retrospective case control | 3 | 1 | 2 | 6 |
Inoue et al. | 2021 | Retrospective cohort | 3 | 1 | 1 | 5 |
Johnston et al. | 2011 | Retrospective cohort | 4 | 1 | 2 | 7 |
Kamath et al. | 2016 | Retrospective cohort | 4 | 2 | 2 | 8 |
Kim et al. | 2017 | Retrospective cohort | 3 | 2 | 2 | 7 |
Lindberg‑Larsen et al. | 2013 | Registry | 4 | 1 | 2 | 7 |
Lorenze et al. | 1998 | Retrospective case control | 3 | 1 | 1 | 5 |
Martin et al. | 2016 | Retrospective case control | 4 | 1 | 0 | 5 |
Mou et al. | 2021 | Retrospective cohort | 4 | 1 | 2 | 7 |
Panchal et al. | 2021 | Retrospective case control | 3 | 2 | 2 | 7 |
Partridge et al. | 2019 | Registry | 3 | 2 | 2 | 7 |
Parvizi et al. | 2006 | Retrospective case control | 3 | 1 | 2 | 6 |
Poultsides et al. | 2017 | Retrospective cohort | 3 | 2 | 1 | 6 |
Quadri et al. | 2015 | Retrospective cohort | 3 | 2 | 2 | 7 |
Rasouli et al. | 2014 | National database | 3 | 1 | 2 | 6 |
Reuben et al. | 1998 | Retrospective case control | 3 | 1 | 1 | 5 |
Saito et al. | 2010 | Retrospective case control | 4 | 1 | 2 | 7 |
Salvati et al. | 1978 | Retrospective cohort | 3 | 1 | 1 | 5 |
Schlegelmilch et al. | 2017 | Retrospective case control | 3 | 1 | 1 | 5 |
Seol et al. | 2015 | Retrospective cohort | 3 | 1 | 1 | 5 |
Shih et al. | 1985 | Retrospective cohort | 2 | 1 | 2 | 5 |
Tan et al. | 2019 | Retrospective cohort | 3 | 2 | 1 | 6 |
Triantafyllopoulos et al. | 2016 | Retrospective cohort | 3 | 1 | 2 | 6 |
Villa et al. | 2019 | Retrospective cohort | 4 | 1 | 2 | 7 |