doch, einzelne schon, wie, bzw. warum hätte man sonst eine Meta-Analyse machen sollen?
Trials described as double-blind, with adequate randomisation, were assumed to be of higher methodological quality.
[...]
110 homoeopathy trials and 110 matched conventional-medicine trials were analysed. The median study size was 65 participants (range ten to 1573). 21 homoeopathy trials (19%) and nine (8%) conventional-medicine trials were of higher quality.
https://www.ncbi.nlm.nih.gov/pubmed/...?dopt=Abstract

