Variable Total Vaccinated Non-vaccinated P-value
Seroconverted (>10 IU/L) Non-responder (<10 IU/L)
Cohort
Total cohort 345 223 (64.6%) 117 (33.9%) 5 (1.5%)
2015 52 52 (100.0%) 0 No record
2016 80 52 (65.0%) 26 (32.5%) 2 (2.5%)
2017 116 59 (50.9%) 54 (46.5%) 3 (2.6%)
2018 97 60 (61.9%) 37 (38.1%) 0
Gender
Male 121 75 (62.0%) 45 (37.2%) 1 (0.8%)
Female 224 144 (64.3%) 76 (33.9%) 4 (1.8%) 0.298
Ethnicity
Chinese 214 149 (69.6%) 63 (29.4%) 2 (0.9%)
Malay 68 32 (47.1%) 35 (51.5%) 1 (1.5%)
Indian 63 43 (68.2%) 18 (28.6%) 2 (3.2%) 0.002