 STATISTICAL METHODS This study utilized a repeated measures design with two within group factors: time to measurement, and stimulation stimulation, control. Stimulation groups electrical foot stimulation and intermittent pneumatic compression IPC were not independent. Blood flow measurements at time 120, 240 were analyzed with t tests and a mixed model. Within the mixed model, the group effect is a fixed effect, and the subject parameter is a random effect. The primary research question was the non-inferiority of the experimental treatment electrical foot stimulation relative to standard treatment intermittent pneumatic compression. The non-inferiority index was 5.0 cmsec; this index was formulated prior to analysis. The questionnaire results were analyzed using Fishers Exact test. P-values that were less than 0.05 were considered to be statistically significant. All analyses were done with SAS 9.1, Cary, NC. 