Baseline demographic characteristics of study population per group
| Overall (n=51) | Comparison (n=26) | Intervention (n=25) | |
|---|---|---|---|
| Age (years), mean (SD) | 45.5 (15) | 46.4 (14) | 44.6 (17) |
| Female, n (%) | 38 (75) | 20 (77) | 18 (72) |
| Ethnicity | |||
| White, n (%) | 48 (94) | 24 (92) | 24 (96) |
| Other, n (%) | 3 (6) | 2 (8) | 1 (4) |
| Smoking status: | |||
| Current, n (%) | 5 (10) | 2 (8) | 3 (12) |
| Former smoker, n (%) | 18 (35) | 11 (42) | 7 (28) |
| Never smoked, n (%) | 28 (55) | 13 (50) | 15 (60) |
| SIMD quintile (1=most deprived, 5=least deprived) | |||
| SIMD 1, n (%) | 14 (28) | 7 (27) | 7 (28) |
| SIMD 2, n (%) | 11 (22) | 6 (23) | 5 (20) |
| SIMD 3, n (%) | 9 (18) | 4 (15) | 5 (20) |
| SIMD 4, n (%) | 5 (10) | 3 (12) | 2 (8) |
| SIMD 5, n (%) | 12 (24) | 6 (23) | 6 (24) |
| Employment status | |||
| Employed, n (%) | 25 (49) | 11 (42) | 14 (56) |
| Unemployed, n (%) | 8 (16) | 3 (12) | 5 (20) |
| Retired, n (%) | 9 (18) | 5 (19) | 4 (16) |
| Student, n (%) | 2 (4) | 1 (4) | 1 (5) |
| Other, n (%) | 7 (14) | 6 (23) | 1 (4) |
| Education level | |||
| Secondary education, n (%) | 18 (35) | 7 (27) | 11 (44) |
| Tertiary/further education, n (%) | 33 (65) | 19 (73) | 14 (56) |
| BMI (kg/m2), mean(SD) | 30.4 (6.8) | 31.3 (8.0) | 29.4 (5.2) |
| Number of comorbidities (over and above index condition), mean (SD) | 2.6 (1.7) | 2.6 (1.9) | 2.6 (1.4) |
| Length of asthma diagnosis (years), median (IQR) | 18.5 (8.6–28.6) | 17.0 (8.6–27.8) | 20.3 (9.7–28.6) |
BMI, body mass index; SIMD, Scottish Index of Multiple Deprivation.