Table 3.
Univariate regression analysis of SGRQ total and component scores on study parameters
| Total | Symptom | Activity | Impact | |
| Age (years) | 0.16 | −0.12 | 0.33 | 0.18 |
| Sex (Male) | −6.99 | −9.47 | −7.70 | −6.16 |
| Height (cm) | 0.03 | −0.24 | −0.06 | 0.15 |
| BMI (Kg/m2) | −0.14 | 0.32 | −0.06 | −0.32 |
| Smoking status | −1.32 | −1.13 | −0.52 | −1.86 |
| Smoking pack years | 0.07 | 0.44 | −0.23 | 0.08 |
| 6 MWD (m) | −0.08 | −0.07 | −0.08 | −0.08 |
| FEV1-pre | −0.02 | −0.01 | −0.02 | −0.01 |
| FEV1-post | −0.01 | −0.01 | −0.02 | −0.01 |
| FVC-pre | −0.01 | −0.01 | −0.01 | −0.01 |
| FVC-post | −0.01 | 0.00 | −0.01 | 0.00 |
| FEV1/FVC | −0.35 | −0.16 | −0.63 | −0.24 |
| VAS 1 | 0.31 | 0.38 | 0.30 | 0.28 |
| VAS 2 | 0.38 | 0.19 | 0.48 | 0.37 |
| Gold classication | 2.69 | 0.70 | 5.27 | 1.56 |
| Self-reported symptoms | ||||
| Cough | −7.16 | 4.10 | −36.03 | 5.65 |
| Sputum | 16.87 | 23.42 | 17.11 | 14.60 |
| Wheeze | 6.54 | 12.92 | 6.72 | 4.23 |
| Dyspnea | 27.82 | 29.31 | 40.93 | 19.48 |
| Weight loss | 16.38 | 15.86 | 17.26 | 15.53 |
| Chest tightness | 6.43 | 13.46 | 10.70 | 1.51 |
| Chest pain | 5.61 | 6.59 | 7.14 | 4.92 |
| Occupation | 0.34 | 0.75 | 1.01 | −0.07 |
| Cooking fuel* | −1.84 | −6.48 | −1.94 | −0.61 |
GOLD - Global initiative for chronic Obstructive Lung Disease. VAS1 - Visual Analogue Score pre-exercise, VAS 2 - Visual Analogue Score post-exercise, BMI=Body Mass Index; FEV1 - Forced Expiratory Volume in one second, FVC-Forced Vital Capacity, pre-prebronchodilator, post-postbronchodilator, SGRQ-St George's Respiratory Questionnaire, BMI-Body Mass Index, 6 MWD -6 Minutes Walking Distance.
*
Cooking fuel types included Firewood, Kerosene, Liquefied natural gas and Electric cooker
Significant variables at p<0.05, are in bold