Table 1 Calculation of the Jadad score
Was the study described as randomised?1
Was the method used to generate the sequence of randomisation described and appropriate (random numbers, computer-generated, etc)?1
Was the study described as double-blind?1
Was the method of double-blinding described and appropriate (identical placebo, active placebo, dummy, etc)?1
Was there a description of withdrawals and drop-outs?1
Deduct one point if method used to generate sequence of randomisation described, but inappropriate (allocated alternately, or according to date of birth, or hospital number)−1
Deduct one point if study described as double-blind, but method of blinding inappropriate−1