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Table 3 Validation of the predictive model with the cutoff points determined in the present study

From: External validation of a new predictive model for falls among inpatients using the official Japanese ADL scale, Bedriddenness ranks: a double-centered prospective cohort study

  1. The value was calculated as the probability of a fall for patients with defined score
  2. Three cutoff points were determined by the minimum score over 90% sensitivity, the optimal point by Youden index, and the maximum score over 90% specificity
  3. The sensitivity, specificity, positive predictive value, and negative predictive value of the model derived from overall patients were 90%, 56%, 7.0%, and 99% with the cutoff score of − 3.26, 90%, 57%, 7.1%, and 99% with − 3.17, and 35%, 90%, 11.4%, and 97% with − 2.18, respectively. In similar fashion, the sensitivity and specificity of the model derived from Hospital O were 91%, 37%, 6.6%, and 100% with the cutoff score of − 3.17, 92%, 38%, 6.5%, and 100% with − 3.26, and 39%, 90%, 10.3%, and 98% with − 2.31, respectively. The sensitivity and specificity of the model derived from Hospital F were 90%, 17%, 8.2%, and 96% with the cutoff score of − 3.87, 76%, 48%, 10.7%, and 96% with − 2.57, and 29%, 90%, 19.4%, and 94% with − 1.91, respectively