Sakuraya A.Tran T.T.T.Sripo N.Watanabe K.Imamura K.Boonyamalik P.Sasaki N.Tienthong T.Asaoka H.Iida M.Nguyen Q.T.Nguyen N.T.Vu T.S.Ngo T.T.Luyen T.T.Nguyen L.D.Nguyen N.T.V.Nguyen B.T.Matsuyama Y.Takemura Y.Nishi D.Tsutsumi A.Nguyen H.T.Kaewboonchoo O.Kawakami N.Mahidol University2025-11-302025-11-302025-01-01Journal of Occupational Health Vol.67 No.1 (2025)13419145https://repository.li.mahidol.ac.th/handle/123456789/113302Objectives: The purpose of this secondary analysis of data from a previous randomized controlled trial (RCT) was to investigate whether an internet-based cognitive behavioral therapy (iCBT) stress management program improved work performance, sick leave, and intention to leave among nurses in Vietnam and Thailand during the COVID-19 pandemic. Methods: Full-time nurses were recruited from hospitals in Vietnam and Thailand. A 2-arm, parallel-group, RCT was conducted. The intervention groups were provided a 7-week self-guided iCBT program. As secondary outcomes, work performance (on-the-job performance and quality of nursing care), sick leave days, and intention to leave the profession and the organization were assessed at baseline and 3-month and 6-month follow-ups in each group. Results: A total of 1203 participants were randomly allocated to the intervention and the control group. The program significantly improved on-the-job performance at 3-month follow-up (P =.0499), although the effect was nonsignificant at 6-month follow-up; Cohen’s d was 0.16 and 0.04, respectively. The program also significantly reduced sick leave at 6-month follow-up (coefficient=−0.21; 95% CI, −0.36 to −0.07; prevalence ratio 0.81), although the effect at 3 months was nonsignificant. However, the effects of the intervention on the quality of nursing care and the intention to leave the profession or the organization were not significant. Conclusions: A smartphone-based iCBT stress management program improved on-the-job performance at 3-month follow-up and decreased sick leave days at 6-month follow-up among hospital nurses in Vietnam and Thailand during the COVID-19 pandemic.MedicineArticleSCOPUS10.1093/joccuh/uiaf0612-s2.0-1050227304831348958541128302