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Table 4 Ability of the Laval Questionnaire to distinguish treated vs. untreated patients*

From: The laval questionnaire: a new instrument to measure quality of life in morbid obesity

  A: Rating of change
(time 3 - time 1)
in the treated group
B: Rating of change
(time 3 - time 1)
in the untreated group
Treatment effect
(A - B)
P value
(A - B)
• Symptoms 2.1 (1.8 to 2.5) 0.3 (0.0 to 0.6) 1.8 (1.3 to 2.3) <0.0001
• Activity/Mobility 3.2 (2.7 to 3.6) 0.2 (-0.2 to 0.6) 3.0 (2.3 to 3.6) <0.0001
• Personal hygiene/Clothing 3.4 (2.9 to 3.8) 0.2 (-0.2 to 0.6) 3.2 (2.5 to 3.9) <0.0001
• Emotions 2.3 (1.9 to 2.8) 0.7 (0.3 to 1.1) 1.7 (1.0 to 2.3) <0.0001
• Social interactions 2.8 (2.3 to 3.2) 1.3 (0.0 to 2.7) 1.4 (0.3 to 2.6) 0.0132
• Sexual life 2.5 (2.0 to 3.0) 0.7 (0.2 to 1.3) 1.8 (1.0 to 2.6) <0.0001
  1. * Results are presented as means (95% confidence intervals).
  2. † p value attached to the group differences during the study period (unpaired t-test)