Table 3. Secular trends in SBP and DBP by physique.

		n	SBP		DBP
			Regression coefficient (95% CI)	P-value	Regression coefficient (95% CI)	P-value
Fourth graders (1994–2010)
Boys	non-overweight	2468	−0.324 (−0.403 to −0.245)	<0.001	−0.399 (−0.467 to −0.330)	<0.001
	overweight	404	−0.306 (−0.516 to −0.097)	0.004	−0.589 (−0.768 to −0.410)	<0.001
	obese	290	−0.288 (−0.539 to −0.038)	0.024	−0.527 (−0.750 to −0.304)	<0.001
Girls	non-overweight	2586	−0.353 (−0.434 to −0.272)	<0.001	−0.400 (−0.468 to −0.332)	<0.001
	overweight	278	−0.553 (−0.822 to −0.284)	<0.001	−0.507 (−0.729 to −0.284)	<0.001
	obese	132	−0.915 (−1.294 to −0.536)	<0.001	−0.514 (−0.817 to −0.212)	0.001
Seventh graders (1997–2010)
Boys	non-overweight	2005	−0.455 (−0.564 to −0.345)	<0.001	−0.432 (−0.517 to −0.347)	<0.001
	overweight	219	−0.458 (−0.781 to −0.135)	0.006	−0.278 (−0.559 to 0.003)	0.052
	obese	144	−0.628 (−1.040 to −0.216)	0.003	−0.099 (−0.427 to 0.229)	0.553
Girls	non-overweight	2083	−0.438 (−0.536 to −0.340)	<0.001	−0.328 (−0.405 to −0.250)	<0.001
	overweight	217	−0.628 (−0.925 to −0.332)	<0.001	−0.489 (−0.765 to −0.214)	0.001
	obese	68	−0.330 (−0.927 to 0.267)	0.274	−0.412 (−0.912 to 0.088)	0.105

SBP, systolic blood pressure; DBP, diastolic blood pressure.