文摘
The generalizability of research data depends on the degree to which the studied sample represents the larger population of interest. By influencing the likelihood of research participation, socio-demographic and clinical factors could bias a sample. To evaluate this, we retrospectively identified 155 consecutive admissions over an 18-month period to a general acute male psychiatry inpatient unit in a Veterans Affairs Hospital on which all competent patients were offered the opportunity to participate in low-risk clinical research. Male inpatients who did (N