Automated hand hygiene compliance system's audible alert reminder increases healthcare worker hand hygiene compliance.

Objective: To evaluate the effectiveness of an automated hand hygiene compliance system (AHHCS) audible alert and vibration for increasing hand hygiene compliance.

Design: A nonrandomized, before-and-after, quasi-experimental study of an AHHCS was implemented in several inpatient units. Over a 51-day period, the system's real-time audible alert was turned on, off, and back on.