From: Relationship between alcohol and primary headaches: a systematic review and meta-analysis
Study authors | Q1 | Q2 | Q3 | Q4 | Q5 | Q6 | Q7 | Q8 | Q9 | Q10 | Overall risk of bias assessment |
---|---|---|---|---|---|---|---|---|---|---|---|
Lambru G et al. [62] | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Low |
Lund N et al. [61] | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Unclear | Yes | Moderate |
Özcan RK et al. [49] | Yes | No | Yes | Yes | Yes | Unclear | Unclear | Yes | No | Yes | High |
Sarker MA et al. [50] | Yes | Yes | Unclear | Yes | Yes | Yes | Yes | Yes | Unclear | Yes | Low |
Kim BS et al. [53] | Yes | Yes | Yes | No | Yes | Yes | No | Yes | No | Yes | Moderate |
Gür-Özmen S et al. [54] | Yes | Unclear | Yes | No | Yes | Yes | Yes | Yes | Unclear | Yes | Moderate |