Table 3 Socioeconomic status and demographics according to severely limited lung function in the sample (N = 4472)
| Â | Stratified by Overall Limited Lung Function | ||
|---|---|---|---|
Not Limited (PF >  = 50%) | Limited (PF < 50%) | p | |
N | 4137 | 335 | Â |
Age (mean (SD)) | 61.48 (11.50) | 69.51 (10.94) |  < .001 |
Female (%) | 47.7 | 46.9 | .815 |
Education (%) |  |  |  < .001 |
 High | 30.4 | 18.9 |  |
 Intermediate | 33.9 | 18.9 |  |
 Low | 35.7 | 62.2 |  |
Income (%) |  |  |  < .001 |
  > 120% | 31.7 | 15.8 |  |
 80%-120% | 32.0 | 28.1 |  |
  < 80% | 36.3 | 56.1 |  |
Occupational Prestige (%) |  |  |  < .001 |
 Very High | 18.1 | 10.4 |  |
 High | 26.0 | 19.1 |  |
 Medium | 36.5 | 41.2 |  |
 Low | 11.5 | 15.8 |  |
 Very Low | 8.0 | 13.4 |  |