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Table 6 Rating of the quality of evidence for individual interventional trials

From: Effect of exogenous estrogens and progestogens on the course of migraine during reproductive age: a consensus statement by the European Headache Federation (EHF) and the European Society of Contraception and Reproductive Health (ESCRH)

  1. Quality of evidence for the individual randomized trials was rated according to the GRADE recommendations (Guyatt et al. [25]. The green dot indicates that the study meets quality of evidence criterion and the red dot that the study does not meet quality of evidence criterion. Where studies did not report information about the individual criterion, this was considered as not meet