Table 2 Characteristics of study participants based on disease severity
From: The association between diet quality and chronic obstructive pulmonary disease: a case-control study
Characteristics | Cases (n = 84) | Control (n = 252) | Quartiles of HEI-2010 score | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cases | Control | ||||||||||||
Q1 (n = 27) | Q2 (n = 16) | Q3 (n = 16) | Q4 (n = 25) | P-value | Q1 (n = 57) | Q2 (n = 68) | Q3 (n = 68) | Q4 (n = 59) | P-value | ||||
Disease severity | Breath shortness | 61.6 ± 21.9 | 4.1 ± 11.4 | 66 ± 17 | 61 ± 22 | 59 ± 24 | 59 ± 26 | 0.66 | 14 ± 19 | 20 ± 21 | 15 ± 19 | 9 ± 12 | 0.16 |
Phlegm | 73 (87) | 9 (3) | 1.2 ± 0.2 | 1.2 ± 0.4 | 1.2 ± 0.4 | 1.1 ± 0.3 | 0.29 | 1.8 ± 0.3 | 1.8 ± 0.3 | 1.9 ± 0.3 | 1.9 ± 0.3 | 0.77 | |
Cough | 64 (76) | 3 (1) | 1.2 ± 0.4 | 1.2 ± 0.4 | 1.2 ± 0.4 | 1.2 ± 0.5 | 0.68 | 1.9 ± 0.3 | 1.8 ± 0.3 | 2 ± 0 | 2 ± 0 | 0.17 | |
FEV1% predicted value | 55.2 ± 18.6 | 94.89 ± 12.44 | 51 ± 18 | 53 ± 18 | 63 ± 19 | 55 ± 18 | 0.21 | 91 ± 13 | 97 ± 13 | 96 ± 8 | 95 ± 13 | 0.49 | |
FVC | 71.2 ± 17.9 | 92.70 ± 13.21 | 67 ± 14 | 71 ± 19 | 83 ± 16 | 67 ± 19 | 0.02 | 86 ± 15 | 94 ± 16 | 92 ± 9 | 94 ± 13 | 0.37 | |
FEV1/FVC ratio | 62.7 ± 9.3 | 82.41 ± 6.07 | 60 ± 10 | 62 ± 9 | 63 ± 9 | 64 ± 9 | 0.59 | 84 ± 8 | 84 ± 6 | 83 ± 5 | 80 ± 5 | 0.13 | |