Liberalization of Visiting Policies in ICU for Reducing High Risk of Post-traumatic Stress Disorder

This was a cluster randomized study of an ICU level intervention to reduce high risk of post-traumatic stress disorder (PTSD) in family members of ICU patients. Participating ICUs had restrictive visiting policies (i.e., \<6 hours/day) before randomization. After an observational period and a washout period, participating ICUs were randomized either to maintain their visiting policies or to liberalize their visiting policies (24 hours a day, 7 days a week.)