This secondary analysis is based on the data from the Study of Pharmacotherapy for Psychotic Depression ( STOP-PD ) in which 259 participants meeting DSM-IV criteria for MDD with psychotic features enrolled between December 2002 and June 2007 ( including 142 aged 60 years ) in a 4-center , 12 - week , double-blind , randomized controlled trial funded by the US National Institutes of Health .