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Table 4 Distracted driving score and subscore reliability and correlation to reported crashes (N = 228)

From: Texting while driving: the development and validation of the distracted driving survey and risk score among young adults

  Cronbach’s Alpha (standardized) Spearman correlation coefficient (test-retest)* Correlation to crash rate: odds ratio per point increase Correlation to crash rate: 95 % confidence interval Correlation to crash rate: p values
DDS 0.93 0.82 1.07 1.03–1.12 p = 0.0005
DDS-reading 0.85 0.82 1.13 1.05–1.21 p = 0.001
DDS-writing 0.86 0.63 1.17 1.06–1.29 p = 0.0015
  1. * Boston cohort only (N=56)