Table 1.

Demographic and clinical characteristics at baseline and outcome visits of 1,695 participants with youth‐onset type 1 and type 2 diabetes and without baseline hypertension in the SEARCH for Diabetes in Youth Cohort Study

Characteristic a	Type 1 (N = 1518)	Type 2 (N = 177)	P value b
Demographics
Male sex, N (%)	753 (49.6)	51 (28.8)	<.001
Age at diagnosis (y)	10.0 (3.8)	13.9 (2.7)	<.001
Non‐Hispanic white race, N (%)	1184 (78.0)	51 (28.8)	<.001
Parental education: some college or more, N (%)	1242 (81.8)	90 (50.8)	<.001
Baseline visit measures
Duration of diabetes (mo) at visit	9.1 (6.3)	10.7 (7.2)	.0033
Weight class, N (%)			<.001
Under/normal weight	1036 (68.4)	14 (8.0)
Overweight	290 (19.1)	21 (11.9)
Obesity class 1	78 (5.1)	22 (12.5)
Obesity class ≥2	111 (7.3)	119 (67.6)
HbA1c(%), mean (SD)	7.6 (1.4)	7.5 (2.3)	.466
HbA1c in mmol/mol, mean (SD)	59.6 (15.8)	58.1 (25.6)	.466
Prehypertensive, N (%)	122 (8.0)	41 (23.2)	<.001
Waist‐height ratio	0.45 (0.05)	0.60 (0.09)	<.001
BMI z‐score	0.5 (1.0)	2.0 (0.6)	<.001
Outcome Visit Measures
Interval (y) from baseline visit to follow‐up visit	7.1 (1.9)	6.8 (2.0)	.164
Waist‐height ratio	0.47 (0.06)	0.61 (0.10)	<.001
Annual change in waist‐height ratio c	0.0017 (0.0079)	0.0015 (0.0094)	.846
BMI (kg/m2)	24.1 (5.0)	34.3 (8.2)	<.001
Annual change in BMI c	0.65 (0.51)	0.18 (0.88)	<.001
HbA1c (%)	9.1 (1.8)	9.2 (3.0)	.592
HbA1c,(mmol/mol)	76.0 (20.1)	77.4 (33.1)	.592
Annual change in HbA1c (%) c	0.23 (0.32)	0.28 (0.51)	.210
Annual change in HbA1c (mmol/mol) c	2.49 (3.53)	3.03 (5.54)	.210

^aData are shown as count (%), or mean (SD).

^b P‐value evaluating differences in characteristics across DM types: t tests (continuous) or chi‐square tests (categorical).

^cAnnualized change from the baseline visit to follow‐up visit.