Patient satisfaction scores are an important measure of performance for both emergency departments (ED) and hospitals as well as physicians. The Press Ganey (PG) survey is a commonly used, validated instrument to measure patient satisfaction for patients discharged from EDs. PG results are often used as a benchmark to both guide as well as judge strategies to improve patient satisfaction, but the impact of both demographic and operational factors on PG scores are not well understood. To determine demographic or operational factors associated with the highest PG scores. Retrospective analysis of 2730 PG Surveys (April 2009-July 2010) from a single, urban, academic, tertiary, level 1 trauma center with ∼85,000 visits/year. A random 30% sample of all discharged ED patients with mailing addresses are sent surveys. Of the 26,981 surveys mailed, the response rate = 13%. Undeliverable surveys (∼6% of total) were excluded from the response rate. Of the responders, 564 did not have an MD name and were excluded. PG surveys are 5-point Likert scale questions, with aggregate data to individual survey sections summarized on a 0-100 scale. PG surveys were matched with patient level data through an integrated electronic data warehouse. Outcome was the PG Overall Score (range 0-100) divided into 2 groups, perfect scores (100, n=405) vs. remaining scores (0-99.99, n= 2316). Univariate analyses were performed using Chi-square, t-test, Wilcoxon-Mann-Whitney as appropriate for the following variables: age, sex, mean wait time and ED volume by month of presentation, ED total LOS, triage acuity level (1-5), shift group, day of week, time of day, month of year, and door-to-doctor time in 30 minute intervals. Logistic regression was then performed with significant variables as well as variables deemed important clinically. Tests for colinearity demonstrated independence of each variable. Overall mean age = 49 (SD 18.8), with males comprising ∼35% of responders. By univariate analysis, only age and door to doctor time were significant. By multivariate analysis, only age [OR; 95% CI] (1.019; 1.013-1.025) and door-to-doctor time (30 min intervals) (0.625; 0.558-0.700) were significant. We repeated the analysis using the same model to predict the outcome of being in the top 20%ile group of PG scores and found the same qualitative results. Older patients and shorter door-to-doctor time was associated with having a perfect (100) patient satisfaction score. These factors may be important when considering strategies to maximize emergency department patient satisfaction as well as assessment of physician performance.