Table 3.

Multivariable-adjusted^a differences in PWV measurements (cm/s) by diabetes status^b and race, ARIC (2011–2013)

	African–American			Whites			P value
	Diabetes	Prediabetes	Normal glucose	Diabetes	Prediabetes	Normal glucose
Carotid-femoral PWV
N	344	443	144	746	1,897	705
Differencea (cm/s)	69.3	13.6	0	106	22.3	0
95% CI	4.1, 134.6	−47.3, 74.4	ref.	77.2, 134.7	−0.9, 45.6	ref.
P value, diabetes by race interaction							0.06
P value, prediabetes by race interaction							0.52
Brachial-ankle PWV
N	357	459	151	840	2,030	753
Differencea (cm/s)	45.4	4.3	0	51.3	24.6	0
95% CI	−13.2, 104.1	−50.6, 59.3	ref.	21.3, 81.2	0.2, 49.1	ref.
P value, diabetes by race interaction							0.37
P value, prediabetes by race interaction							0.37
Femoral-ankle PWV
N	340	438	143	735	1,868	694
Differencea (cm/s)	−8.8	5.1	0	−21.2	−6.4	0
95% CI	−45, 27.3	−28.6, 38.9	ref.	−40, −2.5	−21.5, 8.8	ref.
P value, diabetes by race interaction							0.35
P value, prediabetes by race interaction							0.35

Abbreviations: ARIC, Atherosclerosis Risk in Communities; CI, confidence interval; PWV, pulse wave velocity.

^aModels adjusted for age, gender, race-center, heart rate, hypertension, smoking, and body mass index. The indicator variables for center varied by race group given the varying representation at each of the 4 centers.

^bFasting glucose (FG) and glycated hemoglobin (HbA1c) criteria: (i) diabetes if FG ≥126mg/dl, or currently taking diabetes medication, or HbA1c ≥6.5%. Among those without diabetes, then (ii) prediabetes if fasting glucose 100–125mg/dl or HbA1c 5.7%–6.4%, and (iii) normal glucose if FG <100mg/dl and HbA1c <5.7%.