Table 2 Methodological quality of included studies based on the Newcastle–Ottawa scale
Studies (n = 28) | Selection(0–4stars) | Comparability (0–2 stars) | Outcome (0–3 stars)a,b | Total NOS score (0–9) |
|---|---|---|---|---|
Tanaka 2015 | *** | * | ** | 6 |
Wang 2016 | *** | * | * | 5 |
Murata 2017 | *** | * | ** | 6 |
Bouchi 2017 | ** | * | ** | 5 |
Trierweiler 2018 | *** | ** | ** | 7 |
Murai 2018 | **** | * | *** | 8 |
Hashimoto 2018 | *** | * | ** | 6 |
Yanagita 2019 | **** | ** | ** | 8 |
Okamura 2019 | **** | * | ** | 7 |
Ken 2019 | **** | ** | ** | 8 |
Kaji 2019 | **** | * | ** | 7 |
Noriko 2019 | **** | * | ** | 7 |
Fung 2019 | **** | * | *** | 8 |
Takahashi 2020 | **** | ** | *** | 9 |
Sung 2020 | ** | ** | ** | 6 |
Seo 2020 | ** | * | *** | 6 |
Pechmann 2020 | **** | ** | ** | 8 |
Nakanishi 2020 | *** | ** | ** | 8 |
Mori 2020 | **** | ** | ** | 8 |
Beretta 2020 | *** | * | * | 5 |
Sazlina 2020 | *** | * | * | 5 |
Jung 2020 | **** | ** | *** | 9 |
Gorial 2020 | ** | * | ** | 5 |
Mauren 2020 | **** | ** | ** | 8 |
Cui 2020 | **** | * | ** | 7 |
Chen 2020 | *** | * | ** | 6 |
Ken 2021 | **** | ** | *** | 9 |
Kang 2021 | **** | ** | ** | 8 |