Fig. 5.

For events shown in the lower ½, the rate documented in the NIS was more than twice the rate documented in the NSQIP before discharge. For events shown in the upper ½, the rate documented in the NIS and the rate documented in the NSQIP before discharge were within a twofold difference of each other. For the NSQIP, the percent of patients with adverse events after discharge can be added to the percent of patients with adverse events before discharge to get the total rate of adverse events during the first 30 postoperative days.