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Table 3 Adjusted prevalence ratios and 95%CI stratified by student demographics

From: Cellphone laws and teens’ calling while driving: analysis of repeated cross-sectional surveys in 2013, 2015, 2017, and 2019

Variables Young driver ban Concurrent bans No ban P-values&
Age# < 0.0001
 15–16 years 1.02 (0.94, 1.11) 0.54 (0.49, 0.60) Reference  
  ≥ 17 years 1.08 (1.03, 1.14) 0.90 (0.84, 0.96) Reference  
Sex$ 0.0151
 Female 1.02 (0.96, 1.08) 0.76 (0.70, 0.82) Reference  
 Male 1.07 (1.01, 1.14) 0.86 (0.80, 0.93) Reference  
Race* 0.0229
 White 1.06 (1.01, 1.10) 0.83 (0.78, 0.89) Reference  
 Black or African American 0.97 (0.77, 1.22) 0.74 (0.62, 0.89) Reference  
 Hispanic/Latino 0.93 (0.82, 1.06) 0.66 (0.57, 0.77) Reference  
 Othera 1.08 (0.92, 1.26) 0.89 (0.78, 1.02) Reference  
  1. CI Confidence Interval;
  2. &p-values for the interaction terms of age*law, sex*law, and race*law.
  3. #model adjusted for age, and interaction between age and cellphone laws, sex, race, the state’s percent of students in rural areas, and survey year.
  4. $model adjusted for sex, and interaction between sex and cellphone laws, age, race, the state’s percent of students in rural areas, and survey year.
  5. *model adjusted for race, and interaction between race and cellphone laws, age, sex, the state’s percent of students in rural areas, and survey year.
  6. aOther included: American Indian/Alaskan Native, Asian, Native Hawaiian or Other Pacific Islander, and Multiple- Non-Hispanic/Latino
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