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Validity of the Waterlow screening tool and risks for pressure injury in acute care

Webster, Joan, Gavin, Nicole , Nicholas, Catherine , Coleman, Kerrie , & Gardner, Glenn (2010) Validity of the Waterlow screening tool and risks for pressure injury in acute care. British Journal of Nursing, 19(6), s14-22.

Abstract

Objectives: To assess the validity of the Waterlow screening tool in a cohort of internal medicine patients and to identify factors contributing to pressure injury. Design: Longitudinal cohort study Setting: A tertiary hospital in Brisbane, Australia Participants: 274 patients admitted through the Emergency Department or outpatient clinics and expected to remain in hospital for at least three days were included in the study. The mean age was 65.3 years. Interventions: Patients were screened on admission using the Waterlow screening tool. Every second day, their pressure ulcer status was monitored and recorded. Main outcome measures: Pressure ulcer incidence Results: Fifteen participants (5.5%) had an existing pressure ulcer and a further 12 (4.4%) developed a pressure ulcer during their hospital stay. Sensitivity of the Waterlow scale was 0.67, (95% CI: 0.35 to 0.88); specificity 0.79, (95% CI: 0.73 to 0.85); PPV 0.13, (95% CI: 0.07 to 0.24); NPV 0.98, (95% CI: 0.94 to 0.99). Conclusion: This study provides further evidence of the poor predictive validity of the Waterlow scale. A suitably powered randomised controlled trial is urgently needed to provide definitive evidence about the usefulness of the Waterlow scale compared with other screening tools and with clinical judgement.

Impact and interest:

7 citations in Scopus
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ID Code: 34282
Item Type: Journal Article
Keywords: cohort studies, predictive value of tests, pressure ulcer
ISSN: 0966-0461
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > NURSING (111000)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Nursing
Copyright Owner: Copyright 2010 Please consult the authors.
Deposited On: 31 Aug 2010 11:26
Last Modified: 01 Mar 2012 00:29

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