Table 1.
Quality assessment of the included study.
| Study ID | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Overall score |
|---|---|---|---|---|---|---|---|---|---|---|
| Funayama 2011 | Y | Y | Y | Y | Y | P | N | Y | NR | 6.5 |
| Girerd 2022 | Y | Y | Y | Y | Y | Y | N | Y | NR | 7 |
| Chetran 2022 | Y | Y | Y | Y | Y | NR | Y | Y | Y | 8 |
| Johansson 2022 | Y | Y | Y | Y | Y | P | N | Y | NR | 6.5 |
| Kang 2017 | Y | Y | Y | Y | Y | NR | Y | Y | Y | 8 |
| Kanukurti 2020 | Y | Y | Y | Y | Y | NR | Y | Y | Y | 8 |
| Sultana 2010 | Y | Y | Y | NR | Y | NR | Y | Y | Y | 7 |
| Sutter 2015 | Y | Y | Y | N | Y | NR | Y | Y | Y | 7 |
| Yu 2017 | Y | Y | Y | N | Y | NR | Y | Y | Y | 7 |
1. Was the research question appropriate? 2. Was the study population clearly defined? 3.Were controls selected from the same or similar population including the same timeframe? 4. Did the author followed proper inclusion and exclusion criteria regarding case-control selection? 5. Were the cases clearly defined and differentiated from controls? 6. Were the assessors of exposure/risk blinded to the case or control status of participants? 7. Were the methods of quantity determination clearly defined? 8. Did authors use statistical analyses? 9. Were the measurements/tools valid to conduct the study? Y = Yes (Score = 1), N = No (Score = 0), P = Partially (Score = 0.5), NR = Not reported (No score)