Thi Hong Hanh Tran. A causal model of health-related quality of life among persons with colorectal cancer post-surgery in Vietnam. Doctoral Degree(Nursing Science). Chulalongkorn University. Office of Academic Resources. : Chulalongkorn University, 2023.
A causal model of health-related quality of life among persons with colorectal cancer post-surgery in Vietnam
Abstract:
This cross-sectional correlation study aimed to develop and test a causal relationship among self-efficacy, social support, fatigue, pain, functional status, and health-related quality of life (HRQL). The hypothesized model was constructed based on Ferrans conceptual model of HRQL and the review of the literature. A multi-stage sampling technique was utilized to recruit 256 persons with colorectal cancer (CRC) post-surgery aged between 20 to 59, who visited three hospitals in Northern Vietnam. Research instruments included a the demographic information form, The Functional Assessment of Cancer Therapy - Colorectal (FACT-C), The New General Self-Efficacy Scale (NGSES), The Multidimensional Scale of Perceived Social Support (MSPSS), The Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT Fatigue Scale), The Brief Pain Inventory Short Form (BPI-SF), The Functional status questionnaire (FSQ). Data were collected from May to August 2023. The causal model was confirmed by structural equation modeling (SEM) using SPSS and Mplus program. The study findings indicated that the hypothesized model fit the empirical data and explained 49.7% of the variance of Health-related quality of life. Functional status was the most influential factor affecting health-related quality of life, with a positive direct effect on HRQL (β=.418, p < .001). Additionally, other important factors influencing health-related quality of life among persons with CRC post-surgery included self-efficacy, which had both a positive direct effect (β=.494, p < .05) and negative indirect effects on HRQL via fatigue and pain (β=-.271, p < .05) ; social support had both positive direct (β=.406, p < 0.001) and negative indirect effects on HRQL via fatigue and pain (β=-.143, p < 0.05) ; fatigue had a negative indirect effect on HRQL via functional status (β=-.336, p < .05) ; and pain had a negative indirect effect on HRQL via functional status (β=-.219, p < .05). Therefore, further nursing intervention should consider improving functional status, self-efficacy, and social support, as well as decreasing fatigue and pain to enhance health-related quality of life among persons with CRC post-surgery.