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Table 3 Test-retest reliability in the Boston Metro Area cohort (N = 56)

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

Sample items Spearman correlation coefficient (test retest) p value Kappa
1. Think it safe to text and drive 0.67112 <.0001 0.52
2. Read text messages when drivingR 0.726 <.0001 0.56
3. When read text messages while drivingR 0.791 <.0001 0.67
4. Read email when drivingR 0.683 <.0001 0.62
5. When read emails while drivingR 0.751 <.0001 0.59
6. View maps or directions on phone while drivingR 0.717 <.0001 0.63
7. Write text messages while drivingW 0.529 <.0001 0.44
8. When write text while drivingW 0.656 <.0001 0.54
9. Write emails when drivingW 0.457 0.0004 0.32
10. When write emails while drivingW 0.515 <.0001 0.34
11. View messages on social media sites while drivingR 0.38 0.0041 0.33
Have been a passenger when others are texting and driving 0.655 <.0001 0.54
Drive under the influence 0.654 <.0001 0.45
Fall asleep when driving 0.376 0.0043 0.30
Use of seatbelt when driving 0.569 <.0001 0.65
Car crashes reported    0.62
Enrolled in programs to reduce texting (e.g.AT&T’s “It Can Wait”)    0.67
  1. R indicates items in the reading subscore (Items 2–6, 11)
  2. W indicates items in the writing subscore (Items 7–10)