Table 3.
Variables | Average* (n=621) |
Interhospital range | P-value# | Autumn (n=179) |
Winter (n=144) |
Spring (n=175) |
Summer (n=123) |
P-value‡ |
---|---|---|---|---|---|---|---|---|
Chest radiography (n) | 426 (68.6) | 19.2–100 | <0.001 | 119 (66.5) | 103 (71.5) | 116 (66.3) | 88 (71.5) | 0.418 |
Spirometry (n) | 510 (82.1) | 52.5–100 | <0.001 | 154 (86.0) | 116 (80.6) | 143 (81.7) | 97 (78.9) | 0.389 |
Computed tomography (n) | 96 (15.5) | 2.5–37.5 | <0.001 | 28 (15.6) | 20 (13.9) | 31 (17.7) | 17 (13.8) | 0.751 |
Echocardiogram (n) | 36 (5.8) | 0–9.9 | 0.325 | 10 (5.6) | 6 (4.2) | 10 (5.7) | 10 (8.1) | 0.584 |
Sputum eosinophilia (n) | 0 (0) | 0–0 | – | 0 (0) | 0 (0) | 0 (0) | 0 (0) | – |
Serum total IgE (n) | 34 (5.5) | 0–17.2 | <0.001 | 13 (7.3) | 8 (5.6) | 6 (3.4) | 7 (5.7) | 0.469 |
Serum α1-antitripsin (n) | 53 (8.5) | 0–19.8 | <0.001 | 20 (11.2) | 18 (12.5) | 8 (4.6)§ | 7 (5.7) | 0.026 |
Sputum culture (n) | 53 (8.5) | 0–23.4 | <0.001 | 16 (8.9) | 13 (9.0) | 16 (9.1) | 8 (6.5) | 0.846 |
Six-minute walking test (n) | 110 (17.7) | 0–82.5 | <0.001 | 33 (18.4) | 27 (18.8) | 26 (14.9) | 24 (19.5) | 0.700 |
Shuttle walking test (n) | 0 (0) | 0–0 | – | 0 (0) | 0 (0) | 0 (0) | 0 (0) | – |
Cardiopulmonary exercise test (n) | 3 (0.5) | 0–3.4 | 0.316 | 2 (1.1) | 0 (0) | 0 (0) | 1 (0.8) | 0.344 |
Densitometry (n) | 4 (0.6) | 0–5.1 | 0.001 | 2 (1.1) | 0 (0) | 0 (0) | 1 (0.8) | 0.653 |
Any other health status questionnaires excluding CAT (n) | 0 (0) | 0–0 | – | 0 (0) | 0 (0) | 0 (0) | 0 (0) | – |
Notes:
Data are expressed as mean (SD) or absolute (relative) frequencies depending on the nature of the variable.
Calculated for the variability between centers using ANOVA and Chi-square test, depending on the nature of the variable.
Calculated for the variability between seasons using ANOVA and Chi-square test, depending on the nature of the variable.
Significant difference versus the rest of the seasons.
Abbreviations: ANOVA, analysis of variance; SD, standard deviation; CAT, COPD assessment test.