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Table 2 Multiple linear regression model to evaluate predictors for baseline total SGRQ and after three years follow-up (n = 95)

From: Predictors of health status do not change over three-year periods and exacerbation makes difference in chronic obstructive pulmonary disease

Variables Baseline total SGRQ Coefficient (95% CI) p-value Final total SGRQ Coefficient (95% CI) p-value
Male -3.41 (-11.09, 4.27) 0.380 -0.42 (-7.59, 6.73) 0.905
Age (years) -0.52 (-1.08, 0.03) 0.063 -0.62 (-1.13, -0.10) 0, 019
Smoking status 1.68 (-5.83, 9.20) 0.658 -2.70 (-10.21, 4.75) 0.470
SpO2 (%) -0.60 (-1.72, 0.52) 0.291 -0.35 (-1.06, 0.35) 0.326
Bode index (score) 5.59 (3.73, 7.45) < 0.001 4.90 (3.41, 6.40) < 0.001
Charlson index (score) -1.54 (-4.46, 1.36) 0.294 0.29 (-2.60, 3.20) 0.840
  1. SGRQ: SpO2: pulse oximetry; Baseline (R2 = 0.46; p < 0.05); After three years (R2 = 0.49; p < 0.05)