Table 3 Quality assessment for observation studies by Newcastle Ottawa Scale
Study | Is the case definition adequate? | Representativeness of the cases | Definition of Controls | Comparability of cases and controls on the basis of the design or analysis | Ascertainment of exposure | Same method of ascertainment for cases and controls | Non response | Total scores |
|---|---|---|---|---|---|---|---|---|
James R 2015 | * | - | - | * | * | * | * | 5 |
Vincent K. Dik 2013 | * | * | * | * | * | * | * | 7 |
C Dominianni 2013 | * | * | * | * | * | * | * | 7 |
Chadwick John Green 2014 | * | - | - | * | * | * | - | 4 |
Terryl J. Hartman 2015 | * | * | * | * | * | * | - | 6 |
L.K. Heilbrun 1986 | * | - | - | * | * | * | * | 5 |
Xinyi L 2019 | * | * | * | * | * | * | * | 7 |
Sarah Nechuta 2012 | * | * | * | * | * | * | * | 7 |
Rashmi Sinha 2012 | * | * | * | ** | * | * | * | 8 |
L Joseph Su cohort1 2002 | * | - | - | * | * | * | * | 5 |
L Joseph Su cohort2 2002 | * | - | - | * | * | * | * | 5 |
Can-Lan Sun 2007 | * | * | * | * | * | * | - | 6 |
Alessandra Tavana 1997 | * | - | - | * | * | * | - | 4 |
Gong Yang 2007 | * | * | * | * | * | * | * | 7 |
Gong Yang 2011 | * | * | * | * | * | * | * | 7 |