Background Like a measure of quality ambulatory surgery centers have begun reporting rates of hospital transfer at discharge. Results We studied 3 821 670 patients treated at 1 295 ambulatory surgery centers. At discharge the hospital transfer rate was 1.1/1 0 discharges (95% CI 1.1 Among patients discharged home the hospital-based acute care rate was… Continue reading Background Like a measure of quality ambulatory surgery centers have begun