Table 1 Baseline characteristics of the Singapore General Hospital-Severe Asthma Phenotype Study cohort
| Â | Overall cohort | Study participants | P-value (participants vs. non-participants) |
|---|---|---|---|
Patients (n) | 245 | 76 | Â |
Age (years) | 53.1 ± 19.0 | 54.4 ± 18.2 | NS |
Age of asthma onset (years) | 32.2 ± 21.5 | 35.5 ± 22.6 | NS |
Duration of asthma (years) | 20.9 ± 16.7 | 18.9 ± 15.9 | NS |
Gender (% Males) | 47.3 | 50 | NS |
Ethnicity (%) | Â | NS | |
Chinese | 66.5 | 65.8 | Â |
Malay | 12.2 | 10.5 | Â |
Indian | 15.1 | 18.4 | Â |
Others | 6.1 | 5.3 | Â |
Current or past smokers (%) | 21.6 | 28.9 | NS |
Smoking history (pack-years) | 0 (0–0) Range 0-64 | 0 (0–1) Range 0-64 | NS |
Prebronchodilator FEV1 % (predicted) | 72.2 ± 22.5 | 54.9 ± 17.2 | <0.001 |