Table 4. Subsequent hospitalization and ambulatory visit frequencies and expenses in the enrolled children at age 3 to 10 years.
| HAI group* | Control group | |||
|---|---|---|---|---|
| Total | Bronchiolitis | Other HAI | ||
| All hospitalizations (any diagnosis) | ||||
| All enrolled case no. | 3264 | 1981 | 1283 | 18527 |
| Frequencies | 2272 | 1525 | 747 | 6318 |
| Hospitalization/case | 0.7 ± 1.4 a | 0.8 ± 1.6 a | 0.6 ± 1.1 a | 0.3 ± 0.9 |
| Hospitalizations due to asthma | ||||
| Asthma case no. | 530 | 351 | 179 | 2159 |
| Frequencies | 726 | 559 | 167 | 1729 |
| Hospitalizations/asthma case | 1.4 ± 2.1 a | 1.6 ± 2.4 a b | 0.9 ± 1.3 | 0.8 ± 1.8 |
| Frequency of ambulatory visits | ||||
| Frequencies | 420,226 | 264,764 | 155,462 | 2,119,346 |
| Visits/child | 129 ± 76 a | 134 ± 77 a b | 121 ± 74 a | 114 ± 67 |
| Medical expense | ||||
| All expense (USD$) | 5,734,192 | 3,211,446 | 37,261,008 | 37,261,008 |
| Expense/case (USD$) | 2,741 ± 7,066 a | 2,895 ± 8,854 a b | 2,503 ± 4,843 a | 2,011 ± 2,538 |
Abbreviations: HAI, hospitalized airway infections; USD, United States dollar.
*children who were admitted due to lower airway infections when they were younger than 3 years old.
a p < 0.01 vs. control group.
b p < 0.01 vs. other HAI group.