Data extraction:
Two independent authors (M.H and A.Gha) conducted data extraction and
following information were extracted: the first author’s name,
publication year, country where RCTs were conducted, sample size, study
design, age range and/or mean, soy isoflavones and soy protein dose and
source, intervention duration, placebo kind, subjects health status,
changes in mean of CRP and its corresponding standard deviation. Any
discrepancies in this stage also were resolved through consultation with
third reviewer. We converted all CRP measurements to the same unit
(mg/L). Studies which had more than one intervention or comparison group
were included separately.