Kaveenuntachai D.Jaiboon S.Sumdaengrit B.Silaguntsuti C.Vittayatigonnasak A.Sailamai P.Mahidol University2025-06-242025-06-242025-05-01Journal of Korean Academy of Nursing Vol.55 No.2 (2025) , 178-19020053673https://repository.li.mahidol.ac.th/handle/123456789/110917Purpose: This study evaluated the effectiveness of a mobile application in tracking symptoms and improving symptom management and quality of life (QoL) among breast cancer patients undergoing chemotherapy in Thailand. Methods: A non-randomized controlled trial was used, with 25 participants in the intervention group and 25 in the control group. Research instruments included a demographic data form, the NCI-PRO-CTCAE Items-Thai-Thailand version 1.0, and the European Organization for Research and Treatment of Cancer Quality of Life Core Questionnaire and Breast Cancer-Specific Module. Results: The intervention group had significantly less severe side effects than the control group, with mean differences of –23.33 (95% confidence interval [CI], –27.82 to –18.83) on day 1, –28.18 (95% CI, –33.22 to –23.14) on day 3, –34.63 (95% CI, –40.18 to –29.08) on day 7, –42.56 (95% CI, –48.72 to –36.40) on day 14, and –51.31 (95% CI, –58.13 to –44.48) on day 21 (p<.001 for all). On day 21, participants in the intervention group reported significantly higher scores in the Global Health QoL and Functional Scales compared to the control group (p<.001). Additionally, intervention group participants reported lower scores on the Symptom Scales and higher scores on the Functional Scales than those in the control group (p<.001). Conclusion: The ChemoPro application helped manage chemotherapy-related symptoms and was associated with improved symptom monitoring and QoL. Nonetheless, the study was limited by a small sample size and restriction to Android users. Future research with larger and more diverse populations is recommended before broader implementation in clinical practice.NursingArticleSCOPUS10.4040/jkan.250112-s2.0-1050083947542093758X