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Table 4 Multiple Linear Regression Analysis for Association Between Hemoglobin Level and Physical Functioning Scale (log transformed) after Adjusting for Baseline Characteristics (Following variables were removed because of lack of significant association in bivariate analysis: pack years of smoking, history of myocardial infarction and renal diseases)

From: Association between anemia and quality of life in a population sample of individuals with chronic obstructive pulmonary disease

Variable (n = 484) Regression Coefficient P Value R2
  Beta Std Error   
Hemoglobin 0.01 0.01 0.35 0.1214
Age -0.003 0.001 0.002  
Gender (Female ref) 0.06 0.03 0.04  
Race (Caucasian ref) -0.11 0.04 0.01  
Education 0.02 0.005 0.002  
Diabetes -0.13 0.03 <0.0001