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Effect of vegetarianism on development of gall stones in women

Study shows that non-vegetarian womes are 2 times more likely to develop gallstones than vegetarian women
F Pixley, D Wilson, K McPherson, J Mann

Method
Real time ultrasonography was used to compare the prevalence of gall stones in two groups of women aged 40-69: 632 women recruited from general practice registers and 130 vegetarians.
Results
The prevalence of gall stones was found to increase with age and body mass index. The 2.5 fold increase in risk of developing gall stones in non-vegetarians compared with vegetarians was reduced to 1.9 when controlling for these two potentially confounding factors, but remained significant. A dietary factor associated with vegetarianism may prevent this common condition.