Reliability and validity of the 4-item perceived stress scale among pregnant women: Results from the OTIS antidepressants study

We aimed to estimate the reliability of the 4-item Perceived Stress Scale (PSS) and its validity in predicting maternal depression and quality of life (QoL). Data regarding stress, depression and QoL were collected during pregnancy among a sub-sample from the Organization of Teratology Information Specialists Antidepressants in Pregnancy Cohort. The 4-item PSS demonstrated acceptable internal consistency (Cronbach's alpha coefficient?=?.79), alternate forms stability reliability with the 10-item PSS (Pearson correlation coefficient r?=?.63; p?