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Table 5 Usage of rescue medication (acetaminophen 500 mg) during the study

From: Effect of a natural extract of chicken combs with a high content of hyaluronic acid (Hyal-Joint®) on pain relief and quality of life in subjects with knee osteoarthritis: a pilot randomized double-blind placebo-controlled trial

Data Study group P value
  Hyal-Joint® (n = 11) Placebo (n = 9)  
Subjects using rescue medication    
   Randomization to week 4, n = 12 6 6 1.00
   Week 4 to week 8, n = 12 6 6 1.00
Usage during the first 4 weeks    
   Mean number of capsules (SD) 3.1 (4.2) 6.8 (6.0) 0.172
   Capsules per week (range) 1.2 (0 – 12.1) 7 (0 – 16.5)  
Usage during the study    
   Mean number of capsules (SD) 2.0 (3.0) 4.3 (3.6) 0.184
   Capsules per week (range) 1.1 (-0.7 – 8.5) 3.6 (0 – 9.5)