Table 3 The Newcastle-Ottawa Scale (NOS) for assessing the quality of all cohort studies involved in this meta-analysis
First author | Published year | Representative of the exposed cohort | Selection of the non-exposed cohort | Ascertainment of exposed | Demonstration that outcome of interest was no present at start of study | Control for important cohort | Additional factors | Assessment of outcome | Follow up | Adequacy of follow up | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|
Kaplan | 1987 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Seki | 2001 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Goto | 2003 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Lan | 2007 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Gangwisch | 2008 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Stone | 2009 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Suzuki | 2009 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Kronholm | 2011 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 6 |
Werle | 2011 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 6 |
Kripke | 2011 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 8 |
Castro-Costa | 2011 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Qiu | 2011 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Cohen-Mansfield | 2012 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Jung | 2013 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Kim | 2013 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Yeo | 2013 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Kakizaki | 2013 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Chen | 2013 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Lee | 2014 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Zuurbier | 2015 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Hall | 2015 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Smagula | 2016 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Akersted | 2017 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Beydoun | 2017 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Brostrom | 2018 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 7 |
Cheng | 2018 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Morgan | 2019 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Akersted | 2019 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |