Table 3: Correlations (with p values) for the SGRQ and factors.
| Factors |
Symptoms |
Activity |
Impact |
Total |
| Sexb
|
-0.05 (p = 0.393) |
0.07 (p = 0.234) |
0.06 (p = 0.333) |
0.06 (p = 0.290) |
| Agea
|
-0.16 (p = 0.006)* |
0.14 (p = 0.020)* |
-0.08 (p = 0.155) |
-0.01 (p = 0.880) |
| Incomea
|
-0.03 (p = 0.605) |
-0.09 (p = 0.139) |
-0.06 (p = 0.360) |
-0.07 (p = 0.224) |
| Smokinga
|
-0.05 (p = 0.531) |
0.07 (p = 0.299) |
0.03 (p = 0.597) |
0.04 (p = 0.535) |
| Occupationalb
|
-0.01 (p = 0.847) |
-0.28 (p <0.001)** |
-0.10 (p <0.001)** |
-0.18 (p = 0.002)* |
| Caregiverb
|
-0.00 (p = 0.954) |
-0.03 (p = 0.623) |
-0.02 (p = 0.788) |
-0.02 (p = 0.696) |
| Comorbidityb
|
0.03 (p = 0.665) |
-0.02 (p = 0.798) |
-0.01 (p = 0.902) |
0.00 (p = 0.545) |
| BODE indexa
|
0.21 (p <0.001)** |
0.58 (p <0.001)** |
0.42 (p <0.001)** |
0.52 (p <0.001)** |
| BMIa
|
-0.04 (p = 0.491) |
-0.18 (p = 0.002)* |
-0.12 (p = 0.042)* |
-0.15 (p = 0.010)* |
| mMRCa
|
0.30 (p <0.001)** |
0.72 (p <0.001)** |
0.54 (p <0.001)** |
0.66 (p <0.001)** |
| FEV1%predicteda
|
-0.09 (0.143) |
-0.25 (p <0.001)** |
-0.22 (p <0.001)** |
-0.24 (p <0.001)** |
| 6MWTa
|
-0.03 (0.587) |
-0.36 (p <0.001)** |
-0.12 (p <0.041)* |
-0.23 (p <0.001)** |
| Quartile BODE indexb
|
0.19 (0.002)* |
0.52 (p <0.001)** |
0.35 (p <0.001)** |
0.45 (p <0.001)** |
| ABCD groupb
|
0.28 (p <0.001)* |
0.54 (p <0.001)* |
0.42 (p <0.001)* |
0.52 (p <0.001)** |
a = Pearson’s correlation, b = Spearman’s correlation, *p < 0.05, **p< 0.001.
SGRQ: StGeorge’s respiratoryquestionnaire, BMI: Body massindex, mMRC:modified medical research council dyspnea score, FEV1: Forced expiratory volumeinonesecond, 6MWT: six-minute walking test.