Table 1.
Demographic and medical/asthma characteristics presented as a function of high versus low SES
| Low (< 12 yrs education) n = 306 |
High (≥ 12 yrs education) n = 475 |
|||||
|---|---|---|---|---|---|---|
| Mean or % | 95% CI | Mean or % | 95% CI | F | p | |
| Demographics | ||||||
| Age (yrs)* | 52.3 | 50.8, 53.9 | 46.0 | 44.8, 47.3 | 37.42 | < .001 |
| Sex (% Male) | 40 | 35, 46 | 40 | 36, 45 | 0.00 | .997 |
| Ethnicity (% Caucasian) | 91 | 88, 94 | 92 | 90, 95 | 0.44 | .518 |
| Cohabitating (% yes) | 68 | 62, 73 | 65 | 61, 70 | 0.47 | .492 |
| Employed (% yes) | 49 | 43, 54 | 72 | 68, 76 | 45.73 | < .001 |
| Medical characteristics | ||||||
| BMI (kg/m2)* | 27.8 | 27.3, 28.4 | 26.6 | 26.1, 27.0 | 12.32 | < .001 |
| Current smoker (% yes) | 13 | 9, 16 | 8 | 5, 10 | 5.75 | .017 |
| Pack-years†* | 12.9 | 10.9, 14.9 | 6.6 | 5.0, 8.1 | 23.84 | < .001 |
| Psychiatric comorbidity (% yes)¶ | 32 | 27, 37 | 27 | 23, 32 | 2.02 | .156 |
| Asthma characteristics | ||||||
| FEV1 (% predicted)* | 77.3 | 74.6, 79.9 | 79.9 | 77.8, 82.0 | 2.32 | .129 |
| FVC (% predicted)* | 87.8 | 85.3, 90.2 | 90.5 | 88.6, 92.4 | 3.03 | .082 |
| FEV1/FVC* | 71.4 | 69.6, 73.2 | 72.9 | 71.6, 74.3 | 1.78 | .183 |
| Asthma severity (% moderate or severe) | 92 | 88, 96 | 84 | 80, 87 | 10.94 | .001 |
| Asthma duration (yrs)* | 18.2 | 16.5, 19.9 | 18.9 | 17.5, 20.3 | 0.45 | .502 |
| Atopic (% yes) | 62 | 57, 67 | 77 | 73, 81 | 23.01 | < .001 |
| Bronchodilator use (# times in last week)* | 9.6 | 7.9, 11.3 | 7.0 | 5.6, 8.3 | 5.77 | .017 |
FEV1 = forced expiratory volume in 1 second; FVC = forced vital capacity; BMI = body mass index;
* These values are reported as means
† pack-years = average number of packs (20 cigarettes/pack) smoked per day X number of years smoked;
¶ Mood and-or anxiety disorder