Table 1 Risk of bias assessment
From: The epidemiology of chronic ankle instability with perceived ankle instability- a systematic review
|  | Criterion | Schmitt et al. [18] | Donovan et al. [19] | Koshino et al. [20] | Holland et al. [21] | Doherty et al. [22] | Attenborough et al. [23] | Simon et al. [24] | Tanen et al. [25] | Kobayashi et al. [26] | % Studies with ‘yes’ response |
|---|---|---|---|---|---|---|---|---|---|---|---|
1 | That a clear definition of chronic ankle instability is clearly described | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | 100% |
2 | Study design is cross-sectional or prospective | No | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | 56% |
3 | Description of participants demographics are given | No | No | Yes | Yes | Yes | Yes | No | No | Yes | 56% |
4 | Studies that conducted the random selection process or the studies that analyzed the entire target population receive | No | No | No | No | NA | No | Yes | No | No | 13% |
5 | Prospective studies that collected the data of at least 80% of the participants included in the study. The cross-sectional and retrospective studies receive N/A for this criterion. | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
6 | The injury diagnosis was conducted by health professionals or using valid and reliable tools | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | 100% |
7 | The follow up period: For the prospective studies at least 6 months follow up, for retrospective studies up tp 12 | NA | NA | NA | NA | Yes | NA | NA | NA | NA | NA |
| Â | Total score (%) | 40% | 60% | 80% | 80% | 80% | 80% | 60% | 40% | 80% | Â |