Interrater reliability of the Glamorgan scale: overt and covert data

The Glamorgan Paediatric Pressure Ulcer Risk Assessment Scale (Glamorgan scale) had been developed using statistical analysis of patient data. The aim of this study was to assess the reliability of the Glamorgan scale using overt and covert methods.

For the overt data collection, randomly selected trained nursing staff were invited to participate. Twenty-seven trained nursing staff assessed 27 children and young people within 10 minutes of an assessment by the researcher. For the covert part of the data collection the researcher and the paediatric tissue viability (TV) link nurse risk assessed inpatients on wards and units where the overt data collection had taken place, their findings were compared with the last recorded assessment by the clinical nurses.

In the overt data collection 24 out of 27 nurses agreed with the researcher (88.9% agreement, kappa 0.867). In the covert data collection, 41 out of 55 risk assessments had been completed. Of the 41 completed assessments 34 agreed with the researcher and tissue viability link nurse (82.9% agreement, kappa 0.763).

The level of agreement was good for overt and covert interrater reliability data.