Improving Hand Hygiene Adherence in Healthcare Workers Before Patient Contact: A Multimodal Intervention in Four Tertiary Care Hospitals in Japan

OBJECTIVES: Our objectives were to evaluate hand hygiene adherence among physicians and nurses before touching hospitalized patients and to evaluate changes in hand hygiene adherence after a multimodal intervention was implemented.
DESIGN, SETTING, AND PARTICIPANTS: We conducted a pre- and postintervention study with HCWs at four tertiary hospitals in Niigata, Japan. Hand hygiene observations were conducted from June to August 2018 (preintervention) and February to March 2019 (postintervention).
INTERVENTION: The multimodal hand hygiene intervention recommended by the World Health Organization was tailored to each hospital and implemented from September 2018 to February 2019.
MAIN OUTCOMES AND MEASURES: We observed hand hygiene adherence before touching patients in each hospital and compared rates before and after intervention. Intervention components were also evaluated.
RESULTS: There were 2,018 patient observations preintervention and 1,630 postintervention. Overall, hand hygiene adherence improved from 453 of 2,018 preintervention observations (22.4%) to 548 of 1,630 postintervention observations (33.6%; P < .001). Rates improved more among nurses (13.9 percentage points) than among doctors (5.7 percentage points). Improvement varied among the hospitals: Hospital B (18.4 percentage points) was highest, followed by Hospitals D (11.4 percentage points), C (11.3 percentage points), and Hospital A (6.5 percentage points).
CONCLUSIONS: A multimodal intervention improved hand hygiene adherence rates in physicians and nurses in Niigata, Japan; however, further improvement is necessary. Given the current suboptimal hand hygiene adherence rates in Japanese hospitals, the spread of COVID-19 within the hospital setting is a concern.