A Randomized Controlled Trial Investigated the Effect of Body Awareness

question 392

Multiple Choice

A randomized controlled trial investigated the effect of body awareness therapy (BAT) and aerobic exercises on pain and quality of life in patients with tension-type headache.  Participants were randomly assigned to 1 of 3 groups:  BAT group, aerobic exercise (AE) group, and control group.  Main outcomes were pain severity evaluated by a Visual Analog Scale (VAS) ; pain-related disability measured by the Pain Disability Index (PDI) ; impact of headaches measured by the Headache Impact Tests (HIT) ; and quality of life measured by the Short Form Health Survey (SF-36) .  Baseline characteristics concerning age, weight, height, BMI, VAS, and HIT were not statistically different among the groups (p > 0.05) .  However, there was a statistically significant difference among the groups (p < 0.05) in mean baseline PDI values.  Further evaluation of baseline PDI values revealed the following: Which of the following is likely to be the most valid measure of central tendency for baseline PDI data?

• A)Mean and median both equally valid
• B)Mean, median, and mode all equally valid
• C)Mean only
• D)Median only
• E)Mode only

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