Skip to main content
Fig. 3 | BMC Neurology

Fig. 3

From: A multicenter validation and calibration of automated software package for detecting anterior circulation large vessel occlusion on CT angiography

Fig. 3

Predicted frequency and observed frequency of LVO before and after recategorization of LVO score. (A-C) Calibration plots showing observed probability against expected probability using either unadjusted LVO probability (A) or adjusted LVO probability (B) in the validation and calibration dataset and the independent validation dataset (C). The green dotted line indicates the reference line of perfect agreement. Red spikes indicate each case with LVO (up spike) and without LVO (down spike) at each LVO probability. O: E = ratio of observed and expected LVO frequency; CITL = Calibration-in-the-large, also known as mean calibration. (D) The red line indicates perfect calibration. The red boxes indicate the criterion with the highest Youden index in each hospital. Observed frequencies and their 95% confidence intervals (red shaded areas) after recategorization of patients in the validation and calibration dataset (E) and in the independent validation dataset (F). LVO = large vessel occlusion

Back to article page

BMC Neurology

ISSN: 1471-2377

Contact us