Table 3. Comparison of hepatitis A cases did and did not belong to genomic clusters (N=237).
| Characteristics | Non-cluster (N=140) | Genomic clusters by sequencing | Cluster‡ (N=97) | Odd ratio† (95% CI) | P value |
|---|---|---|---|---|---|
| Sex (%) | 0.050 | ||||
| Female | 64 (45.7) | 32 (33.0) | 1.0 | ||
| Male | 76 (54.3) | 65 (67.0) | 1.7 (1.0–2.9) | ||
| Median age, years (range) | 49 [22–97] | 40 [25–64] | 0.000 | ||
| Risk factors (%) | |||||
| Raw seafood exposure | 31 (22.1) | 42 (43.3) | 2.6 (1.4–4.5) | 0.001 | |
| Raw vegetable exposure | 44 (31.4) | 43 (44.3) | 1.6 (0.9–2.7) | 0.165 | |
| Recent travel history | 14 (10.0) | 5 (5.2) | 0.5 (0.2–1.4) | 0.122 | |
| Household contact | 0 (0.0) | 1 (1.0) | NA |
Data are n (%) unless otherwise specified. †Comparison between gnomically clustered and non-clustered hepatitis A cases. ‡4 individuals in cluster 3 and 1 individual in cluster 6 have no epidemiological information.