Assessment of Methodological Quality of the Studies Included in this Systematic Review According to the Newcastle–Ottawa Quality Assessment Scale Case-Control Studies
| Author (year) | Selection | Comparability | Exposure |
|---|---|---|---|
| Nam et al.18 |  | | |
| Safar et al. (2017)33 | | | |
| Angel et al. (2016)30 | | | |
| Mackway and Badawi (2014)32 | | | |
| Bid et al. (2009) 31 | | | |
| Hossein-Nezhad et al. (2009)29 | | |
| Author (year) | Selection | Comparability | Exposure |
|---|---|---|---|
| Nam et al.18 | | | |
| Safar et al. (2017)33 | | | |
| Angel et al. (2016)30 | | | |
| Mackway and Badawi (2014)32 | | | |
| Bid et al. (2009) 31 | | | |
| Hossein-Nezhad et al. (2009)29 | | |
Note: According to the NOS for case-control studies, a maximum of 9 stars can be assigned: up to 4 stars for Selection, up to 2 stars for Comparability, and up to 3 stars for Exposure. Higher numbers of stars indicate better methodological quality in each domain.
Assessment of Methodological Quality of the Studies Included in this Systematic Review According to the Newcastle–Ottawa Quality Assessment Scale Case-Control Studies
| Author (year) | Selection | Comparability | Exposure |
|---|---|---|---|
| Nam et al.18 | | | |
| Safar et al. (2017)33 | | | |
| Angel et al. (2016)30 | | | |
| Mackway and Badawi (2014)32 | | | |
| Bid et al. (2009) 31 | | | |
| Hossein-Nezhad et al. (2009)29 | | |
| Author (year) | Selection | Comparability | Exposure |
|---|---|---|---|
| Nam et al.18 | | | |
| Safar et al. (2017)33 | | | |
| Angel et al. (2016)30 | | | |
| Mackway and Badawi (2014)32 | | | |
| Bid et al. (2009) 31 | | | |
| Hossein-Nezhad et al. (2009)29 | | |
Note: According to the NOS for case-control studies, a maximum of 9 stars can be assigned: up to 4 stars for Selection, up to 2 stars for Comparability, and up to 3 stars for Exposure. Higher numbers of stars indicate better methodological quality in each domain.
