Table 1 Details of subjects at entry
From: The Darlington and Northallerton Long Term Asthma Study: pulmonary function
| Male | Female | ||
|---|---|---|---|
| n | 457 | 455 | |
| Age (years)(sd) | 50.4(15.4) | 49.3(16.3) | |
| Duration of asthma (years)(sd) | 17.0(16.2) | 18.6(15.4) | |
| Atopic n(%) | 258(56.5) | 227(49.9) | |
| Asthma n(%) | childhood | 124(27.1) | 131(28.8) |
| gap | 53(11.6) | 42(9.2) | |
| adult | 280(61.3) | 282(63.3) | |
| Social Class n(%) | 1–2 | 131(28.8) | 139(30.5) |
| 3 | 168(36.9) | 180(39.6) | |
| 4–5 | 156(34.3) | 136(29.9) | |
| Smoking Habit n(%) | never | 147(32.2) | 247(54.3) |
| ever | 239(52.3) | 161(35.4) | |
| current | 71(15.5) | 47(10.3) | |
| Pulmonary Function(sd) | Actual FEV1 l. | 2.50(1.09) | 1.97(0.79) |
| Best FEV1 l. | 2.60(1.08) | 2.08(0.82) | |
| Best FVC l. | 4.17(1.25) | 3.05(0.84) | |
| Best PEF l/min | 465.7(113.7) | 382.0(85.1) | |
| Actual/Best PEF % | 84.4(13.7) | 83.2(15.9) | |