Table 2.
Average crude and adjusted incidence for hospitalized patients with HPIV infections, Sa Kaeo and Nakhon Phanom Provinces, Thailand, September 1, 2003, to December 31, 2007
| Age group (in years) | Person‐years of Population under Surveillance | Enrolled/eligible patients (% of eligible) | Enrolled patients with CXR‐confirmed pneumonia (% of enrolled) | Enrolled patients with HPIV (% of enrolled) | CXR‐confirmed pneumonia with HPIV (% of patients with CXR pneumonia) | Crude incidence HPIV hospitalization | Incidence/100 000 person‐years | ||
|---|---|---|---|---|---|---|---|---|---|
| Adjusted* incidence HPIV hospitalization (95% CI) | Crude incidence CXR‐confirmed HPIV pneumonia | Adjusted* incidence CXR‐confirmed HPIV pneumonia (95% CI) | |||||||
| <1 | 58 683 | 1343/3216 (42) | 619 (46) | 119 (8·9) | 56 (9·0) | 203 | 486 (402–569) | 95 | 229 (171–286) |
| 1–4 | 244 897 | 2810/6232 (45) | 1356 (48) | 251 (8·9) | 129 (9·5) | 102 | 227 (200–254) | 53 | 117 (98–136) |
| 5–9 | 376 315 | 610/1299 (47) | 240 (39) | 36 (5·9) | 18 (7·5) | 9·6 | 20 (14–27) | 4·8 | 10 (5·7–15) |
| 10–19 | 828 310 | 477/979 (49) | 158 (33) | 16 (3·4) | 8 (5·1) | 1·9 | 4·0 (2·1–5·9) | 1·0 | 2·0 (0·6–3·3) |
| 20–64 | 2 684 669 | 3212/7867 (41) | 1414 (44) | 72 (2·2) | 37 (2·6) | 2·7 | 6·6 (5·1–8·1) | 1·4 | 3·4 (2·3–4·4) |
| ≥65 | 277 618 | 2643/6669 (40) | 1228 (46) | 79 (3·0) | 37 (3·0) | 28 | 72 (56–87) | 13 | 34 (23–44) |
| Total | 4 470 492 | 11 095/26 262 (42) | 5015 (45) | 573 (5·2) | 285 (5·7) | 13 | 30 (28–33) | 6 | 15 (13–17) |
CXR, chest radiograph; CI, confidence intervals; HPIV, human parainfluenza viruse.
*Adjustments were made for enrollment by assuming that the proportion positive for HPIV was the same in enrolled and eligible non‐enrolled patients.