Characteristics Crude OR [95% CI] Adjusted OR [95% CI] Age Group        15–30 y/o 1.00 1.00        31–65 y/o 1.56 [1.30, 1.88] 1.53 [1.26, 1.87] Sex    Female 1.00 1.00    Male 1.36 [1.07, 1.74] 1.35 [1.06, 1.75] History of Donation        First-timer 1.00 1.00        Repeater 0.63 [0.53, 0.77] 0.58 [0.48, 0.71] Occupation        Unemployed 1.00 1.00    Student 0.40 [0.24, 0.63] 0.49 [0.29, 0.71]   Clerk/Call center 1.29 [0.58, 2.53] 1.37 [0.62, 2.71]        OCW/Seafarer 1.38 [0.81, 2.25] 1.16 [0.67, 1.91] Nurse/Doctor 0.09 [0.01, 0.42] 0.12 [0.01, 0.55]        White collar 1.04 [0.83, 1.30] 0.98 [0.78, 1.25]

Table 4: Crude and adjusted odds ratio (OR) and 95% confidence interval (CI) of having a high-risk status and the socio-demographic characteristics of the donor (N=5,067).