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Table 6 Relative validity (RV) of measures in discriminating among smoking symptom groups, German and U.S 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

Sample and measures   Smoking symptom frequency F-ratio RV
Scoringa Noneb A littlec Somed
German Sample   (n = 91) (n = 79) (n = 9)   
Smoking Impact 47.0 (4.4) 50.2 (5.8) 56.1 (12.3) 14.69** 1.00
SF-36 PCS + 57.4 (4.4) 56.4 (4.2) 56.7 (4.4) 1.27 0.09
SF-36 MCS + 54.4 (5.6) 54.4 (5.0) 50.0 (10.3) 2.60 0.18
US Sample   (n = 177) (n = 74) (n = 8)   
Smoking Impact 47.6 (5.7) 56.4 (10.7) 61.0 (10.4) 43.26* 1.00
SF-36 PCS + 54.3 (7.7) 52.0 (6.9) 52.9 (6.7) 2.43 0.06
SF-36 MCS + 50.7 (9.5) 46.0 (11.7) 32.7 (14.7) 15.18* 0.35
  1. *p < 0.05
  2. aNegative (−) indicates higher score equals worse health; positive (+) indicates higher score equals better health
  3. bTotal score less than “A little of the time” on the symptom rating scale
  4. cTotal score between “A little of the time” and “Some of the time” on the symptom rating scale
  5. dTotal score at or above “Some of the time” on the symptom rating scale