Table 1.
Carriage rates of Haemophilus influenzae isolates in different age group in two sites
| Age (years) | Total (n = 362) | Study sites | |||
|---|---|---|---|---|---|
| Beijing Children' Hospital (n = 271) | Youyang Hospital (n = 91) | χ 2 | P | ||
| <1 | 34 (9.3%) | 84 (9.6%) | 55 (8.9%) | 0.22 | .17 |
| 1‐2 | 27 (7.5%) | 44 (7.2%) | 13 (8.8%) | 0.45 | .24 |
| 2‐3 | 30 (8.2%) | 30 (7.9%) | 9 (9.6%) | 0.28 | .19 |
| 3‐4 | 56 (15.4%) | 47 (13.4%) | 9 (12.7%) | 0.02 | .22 |
| 4‐5 | 38 (10.6%) | 23 (11.2%) | 2 (6.5%) | 0.65 | .35 |
| ≥5 | 29 (7.7%) | 43 (8.5%) | 3 (3.3%) | 3.02 | .29 |
| Total | 362 (9.1%) | 271 (9.2%) | 91 (8.6%) | 0.36 | .16 |