TABLE 3.
Age comparison among groups divided by genotypes
| Virus and genotype | No. of cases | Avg age (yr) ± SD | Age distribution [no. (%) of patients]
|
||
|---|---|---|---|---|---|
| 0-1 yr | 1-2 yr | >2 yr | |||
| HRSV-Aa | |||||
| NA1 | 71 | 1.4 ± 0.9 | 26 (36.6) | 30 (42.3) | 16 (22.5) |
| NA2 | 141 | 1.7 ± 1.1 | 35 (24.8) | 53 (37.6) | 53 (37.6) |
| GA5 | 121 | 1.0 ± 0.8 | 71 (58.7) | 31 (25.6) | 19 (15.7) |
| GA7 | 5 | 1.3 ± 1.2 | 3 (60.0) | 0 (0.0) | 2 (40.0) |
| HRSV-Bb | |||||
| BA | 143 | 1.4 ± 1.0 | 58 (40.6) | 51 (35.7) | 34 (23.8) |
| GB3 | 5 | 1.4 ± 1.1 | 3 (60.0) | 0 (0.0) | 2 (40.0) |
| SAB3 | 2 | 0.7 ± 0.3 | 1 (50.0) | 1 (50.0) | 0 (0.0) |
a
For HRSV-A strains, a statistically significant difference in average age was shown between patients with genotypes NA2 and GA5 (P < 0.001), and a statistically significant higher proportion of patients with genotype NA2 than with GA5 that were >2 years old (P < 0.001) was shown.
b
For HRSV-B strains, no statistically significant age differences were found between patients with different genotypes.