Longitudinal effects of permanent supportive housing on insomnia for homeless adults

To examine the longitudinal change in insomnia as adults transition from homelessness to permanent supportive housing (PSH) and whether additional factors may moderate this relationship.

Standardized interviews were conducted with 331 homeless participants in Los Angeles prior to moving into PSH. Outcomes were measured 3, 6, and 12 months after move-in. Insomnia was assessed using the Sleep Condition Indicator, which is a 2-item validated short-form inventory that is intended to be used in clinical settings as a brief screening instrument for insomnia. Mixed-effects models were used to examine insomnia across all 4 measurement points and to test for interactions between time and covariates.

Participants were on average approximately 55 years old and had spent an average of 5.6 years homeless in their lifetime, with approximately 70% identifying as male. Sixty-two percent of the sample screened positive for insomnia disorder at baseline. There was a significantly reduced likelihood of insomnia at each measurement period compared to baseline, but no differences were found between 3, 6, and 12 months. Mental health symptoms, physical health comorbidities, tobacco consumption, and female gender were associated with an increased likelihood of insomnia.

Findings indicate a significant decrease in insomnia after moving into PSH, regardless of time spent homeless.