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evj12039-sup-0001-si.doc886K

Supporting Information Item 1: Telephone questionnaire conducted with cases and controls.

evj12039-sup-0002-si.docx129K

Supporting Information item 2: Univariable associations of categorical and continuous variables with large colon volvulus ≥270° (Tables 1–9).

evj12039-sup-0003-si.docx130K

Supporting Information Item 3: Univariable associations of categorical and continuous variables with large colon volvulus ≥270° (Tables 10–14).

evj12039-sup-0004-si.tiff2577K

Supporting Information item 4: Use of generalised additive models to demonstrate the functional form of the relationship between (a) hours of stabling in a day and (b) number of times transported in a week with the outcome (log odds of large colon volvulus). The plots show the fitted curves with 95% confidence intervals (dashed lines) and the rug plots along the x-axis represent the number of data points. The P value is a chi-square test for nonlinearity.

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