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Table 3 Psychometric properties of smoking-specific measures, German and US current and former smokers

From: Evaluation of smoking-specific and generic quality of life measures in current and former smokers in Germany and the United States

  Item-Total correlations Reliabilitya
  Median Range
German Sample (N = 179)    
Smoking Symptoms 0.42 0.12–0.58 0.71
Smoking Impact 0.44 0.33–0.62 0.72
US Sample (N = 259)    
Smoking Symptoms 0.49 0.37–0.62 0.76
Smoking Impact 0.58 0.48–0.72 0.79
  1. aInternal consistency reliability computed using Cronbach’s alpha