The aim of this study was to conduct a comparative follow-up assessment of clients with depressive symptoms attending monk healers or primary care clinics in Thailand.

Consecutively attending clients of three monk healing and three primary care centres who screened positive (a score of 9 or more) on the Primary Health Questionnaire (PHQ)-9 at the study site were followed up at 3 months after baseline assessment.

In 3 monk healer sites, 448 clients agreed to be screened with the PHQ-9 for depression, and 94 screened positive, and in 3 health centres 582 clients agreed to be screened, and 92 screened positive for depressive symptoms on the PHQ-9. In 2 monk healing sites, 79 clients (84%) were followed up at 3 months, and in 3 health centres, 79 clients (85.9%) were followed up at 3 months. At 3-month follow-up, mixed modelling found significant interaction effects (a time-by-condition interaction, i.e., between-group changes) on depression scores (P = <0.001). Depressive symptoms significantly decreased over time, but there was no significant difference in decline between the two groups.

Clients attending monk healers decreased more in depressive scores compared to clients attending primary care centres, though there was no group effect with respect to number of depressed clients.