“…The mean age was 36.2 years with the majority of cases in the age group of 21–40 years (40%). The mean age of the study population of 36.2 years appears significantly lower when compared to other studies in which the mean age was in the sixth decade Nagarjuna and Prasad [ 12 ] , 2016, O'Farrell et al, [ 14 ] , 2007 and Francisco et al [ 15 ] , 2013 . A possible explanation of the lower age in this study is the ethnic disparity, the differences in food habits, and that chronic calcular cholecystitis is more common in this age group in our locality.…”