Calibration power of the Braden scale in predicting pressure ulcer development.
J Wound Care
; 25(11): 655-659, 2016 Nov 02.
Article
em En
| MEDLINE
| ID: mdl-27827273
ABSTRACT
OBJECTIVE:
Calibration is the degree of correspondence between the estimated probability produced by a model and the actual observed probability. The aim of this study was to investigate the calibration power of the Braden scale in predicting pressure ulcer development (PU).METHOD:
A retrospective analysis was performed among consecutive patients in 2013. The patients were separated into training a group and a validation group. The predicted incidence was calculated using a logistic regression model in the training group and the Hosmer-Lemeshow test was used for assessing the goodness of fit. In the validation cohort, the observed and the predicted incidence were compared by the Chi-square (χ2) goodness of fit test for calibration power.RESULTS:
We included 2585 patients in the study, of these 78 patients (3.0%) developed a PU. Between the training and validation groups the patient characteristics were non-significant (p>0.05). In the training group, the logistic regression model for predicting pressure ulcer was Logit(P) = -0.433*Braden score+2.616. The Hosmer-Lemeshow test showed no goodness fit (χ2=13.472; p=0.019). In the validation group, the predicted pressure ulcer incidence also did not fit well with the observed incidence (χ2=42.154, p=0.000 by Braden scores; and χ2=17.223, p=0.001 by Braden scale risk classification).CONCLUSION:
The Braden scale has low calibration power in predicting PU formation.Palavras-chave
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cicatrização
/
Índices de Gravidade do Trauma
/
Úlcera por Pressão
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article