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School-level prevalence of past 30-day electronic cigarette (e-cigarette) use among central Texas schools receiving the CATCH My Breath e-cigarette prevention program (intervention schools, n = 6) and those not receiving the program (control schools, n = 6), January 2017–May 2018. The P value reflects a bivariate analysis (t test) comparing school-level e-cigarette prevalence at baseline and 16-month follow-up, stratified by intervention schools and control schools.
