The sample size was therefore reduced to 61 participating mothers after both waves of data were collected. (file.scirp.org)
In a study published in the British Journal of Psychiatry, for example, the most anxious 15 percent of participating mothers were twice as likely to deliver children with behavioral concerns like ADHD; the effect remained even after controlling for the mothers» postnatal stress. (educationnext.org)
A research assistant who had no direct contact with participating mothers was responsible for generating the random numbers and preparing the envelopes. (cochranelibrary-wiley.com)