FIGURE 3. Anastomotic diameters in the randomized patients who volunteered for serial measurements 3, 6, and 12 months and occasionally at less than 3 months and more than 12 months after surgery. Number of patients (n), mean, and 95% confidence interval are shown. ANOVA (repeated measures model) was used to test for differences. The few patients, 3 in the neck group and 1 in the chest group, that sought medical attention prior to the scheduled follow-up (<3 months) were measured, dilated, but not included in the ANOVA calculations because of small numbers.