Table 2 Quality assessment result based on Newcastle–Ottawa Scale (NOS)
No | Study author and year | Quality assessment (Newcastle–Ottawa Scale) | Score | Overall quality | ||
|---|---|---|---|---|---|---|
Selection | Comparability | Outcome/exposure | ||||
1 | Chalmers 2021 | ** | * | ** | 5 | Medium |
2 | Rajgopal 2021 | * | * | ** | 4 | Low |
3 | Erivan 2021 | *** | * | ** | 6 | Medium |
4 | Abdelaziz 2020 | **** | * | *** | 8 | High |
5 | Abdelaziz 2019 | **** | * | *** | 8 | High |
6 | Rajgopal 2019 | ** | ** | 4 | Low | |
7 | Panda 2019 | ** | *** | 5 | Medium | |
8 | Burastero 2018 | **** | * | *** | 8 | High |
9 | Kukreja 2018 | * | ** | 3 | Low | |
10 | Bohl 2018 | *** | ** | *** | 8 | High |
11 | Sandiford 2017 | *** | ** | ** | 8 | High |
12 | Girerd 2016 | ** | ** | *** | 7 | High |
13 | Potter 2016 | ** | ** | * | 5 | Medium |
14 | Boureau 2015 | * | ** | 3 | Low | |
15 | Bédard 2015 | ** | ** | * | 5 | Medium |
16 | Brown 2015 | *** | ** | *** | 8 | High |
17 | Kamath 2015 | *** | * | ** | 6 | Medium |
18 | De Martino 2015 | *** | * | *** | 7 | High |
19 | Derome 2014 | *** | *** | 6 | Medium | |
20 | Jensen 2014 | ** | * | ** | 5 | Medium |
21 | Villanueva-Martínez 2013 | *** | * | ** | 6 | Medium |
22 | Rao 2013 | ** | * | *** | 6 | Medium |
23 | Fosco 2013 | ** | * | *** | 6 | Medium |
24 | Schmitz 2013 | *** | *** | 6 | Medium | |
25 | Panni 2013 | * | * | * | 3 | Medium |
26 | Lachiewicz 2012 | * | * | *** | 5 | Medium |
27 | Howard 2011 | *** | * | *** | 7 | High |
28 | Long 2009 | *** | * | ** | 6 | Medium |
29 | Meneghini 2008 | *** | * | ** | 6 | Medium |
30 | Radnay 2006 | * | 1 | Low | ||