Table 1 Results of risk of bias assessment using the modified checklist by Downs and Black [76]
References | Reporting | External validity | Internal validity | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | |
Bayer et al. [106] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
Glazachev et al. [107] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 |
Susta et al. [108] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
Dudnik et al. [109] | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 |
Glazachev et al. [110] | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
Serebrovska et al. [66] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
Serebrovska et al. [111] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
Bestavashvili et al. [112] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
References | Internal validity—confounder | Power | Hypoxia intensity | Total score | |||||
|---|---|---|---|---|---|---|---|---|---|
21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | ∑ | |
Bayer et al. [106] | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 22 |
Glazachev et al. [107] | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 19 |
Susta et al. [108] | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 19 |
Dudnik et al. [109] | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 19 |
Glazachev et al. [110] | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 17 |
Serebrovska et al. [66] | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 21 |
Serebrovska et al. [111] | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 19 |
Bestavashvili et al. [112] | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 22 |