The effect of incorporating covert observation into established overt observation-based hand hygiene promotion programs

Abstract

Covert observation (CO) is reliable for measuring hand hygiene compliance (HHC). However, the benefit of adding CO to overt observation (OO) is uncertain. We evaluated whether incorporating CO into an OO-based hand hygiene (HH) promotion program improves HH rate. Health care worker's HH activities were observed through 5 monitoring sessions (2 in phases 1 and 2 and 1 in phase 3) of simultaneous CO and OO. An intervention was applied-barrier identification interview-only in phase 2. Overall HHC was 91.0% for OO, and 49.3% for CO. HHC in phase 1 was not changed by repeated CO (34.7% and 34.0%, P = .70). HHC based on CO increased to 66.9% in phase 2 after the application of an intervention (P < .01), but decreased to 57.5% in phase 3 (P < .01). HHC based on OO increased significantly between only the first and second sessions in phase 2 (90.8% and 94.5%, respectively, P = .01). Although CO did not significantly change behavior, HHC with CO responded promptly to the application and cessation of a new intervention. CO reflects HHC change more reliably than does OO. However, it is uncertain whether CO will improve HHC.