Table 1.
Summary statistics and multivariate models of LOS in asthma-related hospital admissions in London, 2001–2006
| Characteristics | N (%) |
|---|---|
| Age (years) | |
| <5 | 12,420 (12.4) |
| 5–14 | 10,700 (10.7) |
| 15–44 | 16,612 (16.6) |
| 45–59 | 7,029 (7.0) |
| 60–74 | 5,698 (5.7) |
| ≥75 | 4,309 (4.3) |
| Ethnic Group | |
| White | 26,230 (46.2) |
| Black | 6,604 (11.6) |
| Asian | 6,382 (11.2) |
| Mixed/Other | 5,780 (10.2) |
| Not stated | 11,782 (20.8) |
| Secondary Diagnosis | |
| Other diseases of URT | 25,053 (44.1) |
| Influenza and Pneumonia | 692 (1.2) |
| Other acute lower respiratory infections | 6,256 (11.0) |
| Acute upper respiratory infections | 70 (0.1) |
| Chronic lower respiratory infections | 1,207 (2.1) |
| Lung diseases due to external agents | 1,519 (2.7) |
| Other diseases of respiratory system | 378 (0.7) |
| Other Non-respiratory system diseases | 15,227 (26.8) |
| Missing Values | 6,376 (11.2) |
| Method of Admission | |
| Accident and emergency services | 52,074 (91.7) |
| General Practitioner (GP) | 2,602 (4.6) |
| Bed bureau | 41 (0.1) |
| Consultants out patient clinic | 577 (1.0) |
| Other means | 1,484 (2.6) |
| Meteorological Season | |
| Summer | 12,340 (21.7) |
| Spring | 13,453 (23.7) |
| Autumn | 16,800 (29.6) |
| Winter | 14,185 (25.0) |