Booniam S, Wongpakaran T, Lerttrakarnnon P, et al. - Among elderly Thai patients in tertiary care settings, predictors of passive suicidal ideation (SI), active SI, and suicide attempt (SA) were compared. The Mini-International Neuropsychiatric Interview and the Structured Clinical Interview for DSM-IV-TR were used for assessing psychiatric diagnoses and suicidality of 803 older people. The Montreal Cognitive Assessment, multidimensional scale of perceived social support (MSPSS), 15-item Thai geriatric depression scale (TGDS-15), 10-item perceived social scale and the Core Symptoms Index were completed by all participants. Findings revealed passive SI, active SI and SA among 20.42%, 3.74% and 2.37%, respectively, of patients. Major depressive disorder was noted to be the main predictor for SI, both passive and active; however, among individuals with SA, agoraphobia and poor perceived social support were more pronounced.