Table 8.
Comparison of the pulmonary function parameters between the groups of 80-year-olds
| Healthy controls
|
COPD
|
|||
|---|---|---|---|---|
| Non-advanced elderly | Advanced elderly | Non-advanced elderly | Advanced elderly | |
| FVC (%predicted) | 92.76±16.11 | 100.19±22.74 | 74.45±18.06b | 78.97±19.99a |
| FEV1(%predicted) | 93.25±18.77 | 102.10±21.53 | 49.81±19.89b | 60.97±20.33a,c |
| FEV1/FVC (%) | 77.53±7.01 | 77.72±6.01 | 50.41±13.13b | 56.95±10.84a,c |
| MMEF (%predicted) | 65.81±29.60 | 65.76±2,768 | 17.13±10.27b | 22.90±11.55a,c |
| Z5 (%predicted) | 80.64±30.35 | 78.95±2,901 | 189.76±96.32b | 139.26±56.75a,c |
| Fres (L/s) | 13.81±3.94 | 12.70±3.78 | 23.45±7.15b | 21.62±6.64a |
| X5 (kPa/L/s) | −0.10±0.05 | −0.10±0.07 | −0.33±0.22b | −0.23±0.15a,c |
| R5 (%predicted) | 81.04±23.25 | 76.16±2,704 | 165.98±75.20b | 122.07±43.47a,c |
| R20 (%predicted) | 74.12±16.62 | 68.27±1803 | 105.02±36.65b | 84.53±25.29a,c |
| R5–R20 (%predicted) | 125.50±83.07 | 129.22±108.75 | 567.23±396.92b | 383.68±244.33a,c |
Notes: Data are expressed as the mean ± standard deviation.
a
P<0.001 compared with the advanced elderly healthy patients.
b
P<0.001 compared with the non-advanced elderly healthy patients.
c
P<0.05 compared with the non-advanced elderly COPD patients.
Abbreviations: FVC, forced vital capacity; FEV1, forced expiratory volume in 1 second; MMEF, maximum midexpiratory flow rate; Z5, respiratory impedance; Fres, resonant frequency; X5, respiratory reactance; R5–R20, respiratory resistance.