Basic characteristics of SOS subjects with DNA and data for uric acid levels in the total sample and by surgery group.

Main effect P value is for the main effect of surgery technique on variable of interest. For variables showing a significant main effect of surgery technique, post-hoc pair-wise comparisons were run to test the mean difference between the combined banding group (vertical banded gastroplasty and banding) and gastric bypass group. N represents the number of subjects with DNA and data for uric acid level at each time point. To convert µmol/L to mg/dL divide values by 59.48.