Table 2 Determination of overall risk of bias
From: Return to work after major trauma: a systematic review
Overall rating of risk of bias | Number of domains of a total of 6 in each category | ||
|---|---|---|---|
Low | Moderate | High | |
Low risk of bias | 6 | 0 | 0 |
4–5 | 1–2 | 0 | |
Moderate risk of bias | 3 | 3 | 0 |
Any | 1 | 1 | |
High risk of bias | Any |  ≥ 2 | 1 |
Any | Any |  ≥ 2 | |
Any |  ≥ 4 | Any | |