Methods: This cross-sectional study recruited blood donors at selected public hospitals in the Malaysian State of Sarawak in 2019. A structured questionnaire was developed based on the review of relevant literature. It gathered information on socio-demographic characteristics, knowledge, attitude, subjective norm and self-efficacy on the intention to donate HSC. Variables with a p value <0.200 in bivariate analysis were included in the variable selection for regression modeling to examine their associations with the intention to donate HSC.

Results: A total of 569 blood donors participated (94.5% response rate). Overall, 87.1% reported a positive intention to donate HSC. In the regression model, the factor with the greatest association with intention to donate HSC was subjective norms about HSC donation (β = 0.35, 95% CI 0.27-0.42), followed by attitude about regulations of HSC donation (β= 0.21, 95% CI 0.13-0.35), self-efficacy on HSC donation (β = 0.15, 95% CI 0.09-0.32), attitude about the potential side effects of HSC donation (β = 0.14, 95% CI 0.02-0.10) and highest education level (β = 0.10, 95% CI 0.03-0.44).