Research Article
Association of ABO Blood Group Phenotype and Allele Frequency with Chikungunya Fever
Table 2
Univariate analysis for symptomatic manifestations.
| Variables | Asymptomatic | Symptomatic | RRR | 95% CI | RRR | 95% CI |
| Age (years) | | | | | <40 | Reference | | Reference | | 40–60 | 1.8 | 1.09, 2.97 | 1.34 | 0.84, 2.13 | >60 | 1.79 | 1, 3.21 | 0.82 | 0.45, 1.49 | Gender | | | | | Male | Reference | | Reference | | Female | 0.6 | 0.38, 0.95 | 0.66 | 0.42, 1.05 | ABO blood group | | | | | O | Reference | | Reference | | A | 1.05 | 0.65, 1.8 | 1.07 | 0.63, 1.82 | B | 1.13 | 0.67, 1.92 | 0.91 | 0.53, 1.55 | AB | 0.56 | 0.24, 1.31 | 0.86 | 0.41, 1.78 |
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RRR: relative risk ratio.
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