Quadratic trends indicate a significant but nonlinear trend in the data over time. ... only for variables with significant temporal changes from the earliest year of data collection to 2009 or during 2007-2009. ... Overall, the prevalence of having rarely or never worn a seat belt was higher among male (11.5%) than female (7.7 %)anbsp;...
|Title||:||Morbidity and Mortality Weekly Report|