Characteristics of diagnostic subgroups
| Diagnostic subgroups | |||||
|---|---|---|---|---|---|
| PNDS (n=9) | GOR (n=8) | CVA (n=10) | Dual (n=8) | Idiopathic (n=8) | |
| Age (years) mean (range) | 46 (26–63) | 54.1 (34–77) | 47.2 (18–69) | 43 (18–63) | 47.4 (31–60) |
| Male/female | 6/3 | 2/6 | 1/9 | 3/5 | 2/6 |
| Cough duration (months) | |||||
| mean (range) | 100.6 (9–240) | 80 (8–240) | 80.7 (3–240) | 45.5 (2–144) | 19 (6–36) |
| Atopy | 2 | 2 | 2 | 3 | 0 |
PNDS = post-nasal drip syndrome; GOR = gastro-oesophageal reflux; CVA = cough variant asthma.
Atopic status based on history and total serum IgE (normal <120 kU/l) and specific serum IgE to four common inhaled allergens (house dust mite, mixed grasses, epithelia mix and cat/dog dander) (score <1 rated negative) measured by radioallergosorbent test (RAST).