Additional file 1:.Direction of differences in item intercepts for strong invariance models (modification indices >3.84) comparing pregnant v non-pregnant women. Format: DOC Size: 45KB Download file This file can be viewed with: Microsoft Word Viewer Fuller-Tyszkiewicz et al. BMC Pregnancy and Childbirth 2012 12:91 doi:10.1186/1471-2393-12-91 |