Hair Collection for Cortisol Among Youth Experiencing Homelessness.

Background: Investigations of chronic physiological stress measured by hair cortisol are rapidly expanding among community samples of adolescents and adults. However, research examining physiological stress among youth experiencing homelessness is nascent despite the youth's increased risk for adverse exposures and subsequent impaired mental health.

Objective: This article aimed to examine the feasibility of collecting hair for measuring cortisol among diverse youth experiencing homelessness and gain an understanding of variation in participation.

Methods: Analysis of survey and hair participation data from three pilot studies among youth experiencing homelessness was conducted. Survey measures included sociodemographic characteristics (age, race and ethnicity, sex assigned at birth, and sexual orientation) and reasons for nonparticipation. Descriptive analysis examined participation rates in hair collection for cortisol measurement, including sociodemographic differences in participation.

Results: Participation in the hair sampling for cortisol was high for the combined sample (88.4%), with some variation across the three pilot studies. Insufficient hair for cutting was the most common reason for not participating; Black and multiracial youth, as well as male youth, had a higher prevalence of nonparticipation.

Discussion: The collection of hair for cortisol research among youth experiencing homelessness is feasible, and integration of physiological measures of stress into research with this vulnerable population should be considered, given their high risk for adversity and death by suicide and drug overdose. Methodological considerations and avenues for potential research are discussed.