Obesity (OR=2.02, 95% CI 1.45 - 2.81), central obesity (OR=2.27, 95% CI 1.72 - 2.99), boys (OR=1.57, 95% CI 1.23 - 1.99), and age (OR=1.40, 95% CI 1.31 - 1.50) were related factors to elevated blood pressure in adolescents.