Format

Send to

Choose Destination
BMJ Qual Saf. 2014 Dec;23(12):974-80. doi: 10.1136/bmjqs-2014-003080. Epub 2014 Jul 7.

Quantification of the Hawthorne effect in hand hygiene compliance monitoring using an electronic monitoring system: a retrospective cohort study.

Author information

1
Institute of Health Policy, Management & Evaluation, University of Toronto, Toronto, Ontario, Canada Department of Medicine, McMaster University, Hamilton, Ontario, Canada.
2
Infonaut Inc, Toronto, Ontario, Canada Faculty of Information, University of Toronto, Toronto, Ontario, Canada.
3
Institute of Health Policy, Management & Evaluation, University of Toronto, Toronto, Ontario, Canada.
4
Department of Infection Prevention & Control, University Health Network, Toronto, Ontario, Canada Department of Medicine, University of Toronto, Toronto, Ontario, Canada.

Abstract

BACKGROUND:

The Hawthorne effect, or behaviour change due to awareness of being observed, is assumed to inflate hand hygiene compliance rates as measured by direct observation but there are limited data to support this.

OBJECTIVE:

To determine whether the presence of hand hygiene auditors was associated with an increase in hand hygiene events as measured by a real-time location system (RTLS).

METHODS:

The RTLS recorded all uses of alcohol-based hand rub and soap for 8 months in two units in an academic acute care hospital. The RTLS also tracked the movement of hospital hand hygiene auditors. Rates of hand hygiene events per dispenser per hour as measured by the RTLS were compared for dispensers within sight of auditors and those not exposed to auditors.

RESULTS:

The hand hygiene event rate in dispensers visible to auditors (3.75/dispenser/h) was significantly higher than in dispensers not visible to the auditors at the same time (1.48; p=0.001) and in the same dispensers during the week prior (1.07; p<0.001). The rate increased significantly when auditors were present compared with 1-5 min prior to the auditors' arrival (1.50; p=0.009). There were no significant changes inside patient rooms.

CONCLUSIONS:

Hand hygiene event rates were approximately threefold higher in hallways within eyesight of an auditor compared with when no auditor was visible and the increase occurred after the auditors' arrival. This is consistent with the existence of a Hawthorne effect localised to areas where the auditor is visible and calls into question the accuracy of publicly reported hospital hand hygiene compliance rates.

KEYWORDS:

Compliance; Infection control; Nosocomial infections

PMID:
25002555
PMCID:
PMC4251174
DOI:
10.1136/bmjqs-2014-003080
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for HighWire Icon for PubMed Central
Loading ...
Support Center