Table 4 C-statistic value for the prediction of poor outcome at 3 months.

From: Increased blood pressure variability during the subacute phase of ischemic stroke is associated with poor functional outcomes at 3 months

Indicators

Model 1

Model 2

C-statistic

Change in c-statistic

p

C-statistic

Change in c-statistic

p

Clinical factors

0.802

—

Referent

0.818

—

Referent

24-hour SBP SD

0.809

0.007

0.31

0.826

0.008

0.21

24-hour SBP CV

0.805

0.003

0.48

0.820

0.002

0.59

24-hour DBP SD

0.822

0.020

0.048

0.834

0.016

0.07

24-hour DBP CV

0.819

0.017

0.07

0.833

0.015

0.07

Morning surge

0.803

0.001

0.89

0.821

0.003

0.42

Nondipper type

0.804

0.002

0.43

0.819

0.001

0.39

  1. The c-statistic for each model (model 1: age, sex, NIHSS score at admission; model 2: age, sex, variables (except for stroke subtypes) with p values less than 0.20 in the univariate analysis) was calculated to assess each model’s ability to predict the stroke outcome. The p value for the increase in c-statistic in a model with each BP parameter added to the clinical factors was compared with that in a model with clinical factors only.
  2. SBP, systolic blood pressure; DBP, diastolic blood pressure; SD, standard deviation; CV, coefficient of variation.
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