Table 2.
Characteristics of patients according to spirometry quality*
| Characteristic |
Adequate quality |
Inadequate quality |
p-value |
|---|---|---|---|
| n = 83 (73%) | n = 30 † (27%) | ||
|
Physician diagnosis |
|
|
|
| Asthma exacerbation |
47 (78%) |
20 (22%) |
0.23 |
| COPD exacerbation |
36 (70%) |
10 (30%) |
|
|
Age, years |
|
|
|
| <35 |
14 (70%) |
6 (30%) |
0.91 |
| 35-64 |
53 (75%) |
18 (25%) |
|
| ≥65 |
16 (73%) |
6 (27%) |
|
|
Female |
57 (73%) |
21 (27%) |
0.50 |
|
BMI, kg/m2 |
|
|
|
| <18.5 (Underweight) |
5 (71%) |
2 (29%) |
0.82 |
| 18.5-24.9 (Normal) |
16 (73%) |
6 (27%) |
|
| 25-29.9 (Overweight) |
17 (81%) |
4 (19%) |
|
| ≥30 (Obese) |
45 (71%) |
18 (29%) |
|
| Median days from hospital admission to spirometry testing (IQR) | 1 (1 to 2) | 1 (0 to 2) | 0.06 |
Values above represent n (row %), unless otherwise specified.
Abbreviations: IQR Interquartile range.
* Due to rounding, percentages may not add to 100%.
† Includes spirometry tracings in which one (n = 25, 22%) or both (n = 22, 19%) raters graded the effort as not acceptable or not reproducible based on ERS/ATS criteria.