Table 2 Prevalence of dry and productive cough at follow-up in subjects with and without identifiable respiratory disease according to respiratory conditions, demographic characteristics, and health status.
| Â | Â | Dry cough | Cough + sputum |
|---|---|---|---|
All subjects (n = 3206) | Â | 12.1 | 4.6 |
Respiratory disease | Â | Â | Â |
Asthma* (433) | Â | 25 | 6 |
Emphysema†(43) |  | 37 | 23 |
Chronic bronchitis†(227) |  | 22 | 12 |
Airways obstruction** (150) | Â | 30 | 11 |
≥ 12% FEV1 reversibility (129) |  | 14 | 9 |
No respiratory disease (n = 2408) | Â | 8.8 | 3.8 |
Sex | Male | 10.3 | 4.9 |
| Â | Female | 7.3 | 2.6 |
Smoking status | Current | 20.9 | 7.3 |
| Â | Former | 6.6 | 2.4 |
| Â | Never | 5.5 | 3.3 |
Age (years) | < 40 | 6.3 | 4.9 |
| Â | 40-54 | 10.5 | 3.6 |
| Â | 55 and over | 10.4 | 1.9 |
Atopy | Yes | 9.2 | 4.3 |
| Â | No | 8.0 | 2.9 |
ACE inhibitor use | Yes | 14.4 | 2.7 |
| Â | No | 8.3 | 3.8 |
GHQ disturbance | High | 15.9 | 7.8 |
| Â | Low/none | 7.7 | 3.2 |
Self-rated health general health | Fair/Poor | 19.3 | 6.0 |
| Â | Good/excellent | 8.8 | 2.2 |
SF - 36 Mean (SE) | PCS | 44.5 (0.5) | 44.7 (0.8) |
| Â | MCS | 49.6 (0.6) | 47.8 (1.0) |