Table 2 The Newcastle-Ottawa Scale (NOS) for assessing the quality of nonrandomized studies in our study
Study | Year | Country | Type of Article | The Newcastle-Ottawa Scale (NOS) | ||
|---|---|---|---|---|---|---|
Selection | Comparability | Exposure | ||||
Deng et al. [16] | 2021 | China | Single-center, retrospective case-control study | * * * * | * | * * * |
Fan et al. [17] | 2023 | China | Multi-center, prospective and retrospective case-control study | * * * * | Â | * * * |
Fujikawa et al. [18] | 2022 | Japan | Single-center, retrospective case-control study | * * * * | * | * * |
Hou et al. [19] | 2022 | China | Multi-center, retrospective case-control study | * * * * | * | * * * |
Jeon et al. [12] | 2021 | Korea | Multi-center, retrospective case-control study | * * * * | * | * * * |
Mikubo et al. [13] | 2023 | Japan | Single-center, retrospective case-control study | * * * * | Â | * * * |
Weng et al. [20] | 2020 | China | Single-center, retrospective case-control study | * * * * | * | * |
Woo et al. [21] | 2022 | Korea | Multi-center, retrospective case-control study | * * * * | * * | * ** |
Xu et al. [22] | 2022 | China | Single-center, retrospective case-control study | * * * * | * | * * * |
Yanagawa et al. [23] | 2022 | Japan | Single-center, retrospective case-control study | * * * * | Â | * * * |
Yoshida et al. [24] | 2022 | Japan | Single-center, retrospective case-control study | * * * * | * | * * |
Zhang et al. [25] | 2022 | China | Single-center, retrospective case-control study | * * * * | * | * * |