Table 1:

Baseline Characteristics, Risk Factor Distributions, and Etiologic Mechanisms for Patient Data in Training, Validation, and Test Cohorts

Note.—Data are percentages with numbers in parentheses for categorical variables and medians with interquartile ranges in parentheses for continuous or ordinally scaled variables. Statistical significance (with a significance level of α = .05) of differences among patient cohorts was estimated by using Fisher exact test (for categorical variables) or Kruskal-Wallis test (for ordinal or continuous variables). mRS = modified Rankin Scale, NIHSS = National Institutes of Health Stroke Scale, TIA = transient ischemic attack, T/L = T type and L type, TOAST = Trial of Org 10172 in Acute Stroke Treatment.