Abstract：
OBJECTIVE:This analysis evaluates and ranks efficacy endpoints often used in headache trials concerning their clinical relevance in relation to the patient-related criterion "global assessment of overall efficacy" based on data gained in a large trial investigating different over-the-counter drugs in the treatment of headache. BACKGROUND:The original study showed a significant superiority of the fixed combination of acetylsalicylic acid+paracetamol+caffeine over the combination without caffeine, the single preparations, and placebo in the treatment of headache. METHODS:For 1734 patients included in the efficacy analysis we investigated the correlation of patient's global efficacy assessment with the endpoints "time to 50% pain relief" (primary endpoint), "time to be pain-free," pain intensity difference, sum of pain intensity difference, and extent of impairment of daily activities. Patients recorded pain intensity on a visual analog scale. Efficacy, tolerability, and extent of impairment of daily activity were assessed on verbal rating scales.A logistic regression, proportional odds model was adapted to the time to event data. RESULTS:The highest correlation with patient's global efficacy assessment was demonstrated for the primary endpoint time to 50% pain relief (r = 0.6727) and the sum of pain intensity difference (r = 0.7037). The frequency distribution of patient's global efficacy assessment depended primarily on the time to 50% pain relief and similarly, but to a somewhat lesser extent, on the reduction of pain intensity to 10 mm as assessed on the visual analog scale. More than 86% of the patients assessed efficacy as very good or good when their pain was reduced by 50% at least within 1 hour after drug intake. The patients accept a longer time span than 2 hours for reaching no pain to give a positive global evaluation of efficacy.
journal_name
Headachejournal_title
Headacheauthors
Pageler L,Diener HC,Pfaffenrath V,Peil H,Aicher Bdoi
10.1111/j.1526-4610.2008.01242.xsubject
Has Abstractpub_date
2009-05-01 00:00:00pages
646-54issue
5eissn
0017-8748issn
1526-4610journal_volume
49pub_type
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