Table 1

 Characteristics of irritable bowel syndrome (IBS) patients receiving either melatonin or placebo

ParameterMelatoninPlacebo
There were no significant differences between the two groups.
n2020
Age (y) (mean (SEM))27.15 (1.95)27.70 (2.45)
Sex (M/F)8/128/12
IBS subtype (n)
    Constipation predominant86
    Diarrhoea predominant99
    Alternating35