Mean NHANES % predicted (std) | Below LLN and symptoms N = 110 (%) | Below LLN and no symptoms N = 110 (%) | Adjusted prevalence ratio*** (95% CI) | p-value | |
---|---|---|---|---|---|
Median | |||||
FEV1 | 72.1 (21.5) | 75 (68.2) | 51 (46.4) | 1.73 (1.11, 2.69) | 0.015* |
74.0 | |||||
FVC | 81.7 (23.6) | 61(55.5) | 49 (44.6) | 1.66 (1.0, 2.77) | 0.051 |
80.0 | |||||
FEV1/FVC ratio % | 82.4 (0.09) | 15 (13.6) | 9 (8.2) | 2.25 (0.542, 9.34) | 0.264 |
84.3 | |||||
FEF25-75% | 95.1 (39.1) | 16 (14.6) | 9 (8.2) | 1.60 (0.50, 5.16) | 0.431 |
93.2 | |||||
Any abnormal parameter | 82 (74.5) | 64 (59.1) | 1.62 (1.10, 2.39) | 0.015* | |
Air-Flow pattern results** | Normal | 28 | 45 | ||
Obstructive§ | 12 | 8 | |||
Mild | 3 | 0 | |||
Moderate | 4 | 3 | |||
Severe | 5 | 3 | |||
Very severe | 0 | 2 | |||
Restrictive§§ | 46 | 34 | |||
FEV1<LLN§§§ | 24 | 23 |