Table 1

Baseline characteristics at time of enrollment in DCCT by SBP category

Baseline characteristics at DCCT enrollmentSBP <120 mmHg (N = 908)SBP 120 to <130 mmHg (N = 376)SBP 130 to <140 mmHg (N = 135)SBP ≥140 mmHg (N = 22)
Age, mean ± SD (years)26.2 ± 7.327.6 ± 6.828.1 ± 6.229.4 ± 5.7
Female sex, N (%)516 (56.8)137 (36.4)25 (18.5)2 (9.1)
White, N (%)871 (95.9)366 (97.3)132 (97.8)22 (100.0)
Education, mean ± SD (years)13.9 ± 2.314.3 ± 2.214.5 ± 2.115.0 ± 1.7
Family history of hypertension, N (%)502 (55.3)215 (57.2)83 (61.5)11 (50.0)
Duration of diabetes, median (IQR) (years) 3.9 (2.1–8.7)4.3 (2.2–8.9)4.7 (2.3–10.1)9.7 (3.9–11.9)
Retinopathy at baseline, N (%)428 (47.1)191 (50.8)78 (57.8)18 (81.8)
BMI, mean ± SD (kg/m2)23.1 ± 2.723.8 ± 2.724.7 ± 2.824.7 ± 2.7
Hemoglobin A1c, mean ± SD (%)9.0 ± 1.68.8 ± 1.58.6 ± 1.58.8 ± 1.1
Serum creatinine, mean ± SD (mg/dL) 0.78 ± 0.150.82 ± 0.140.88 ± 0.150.90 ± 0.11
eGFR by CKD-EPI equation, mean ± SD (mL/min/1.73 m2)127.0 ± 14.9125.4 ± 12.8123.0 ± 13.0120.5 ± 9.3
Microalbuminuria (≥30 mg/day), N (%)89 (9.8)46 (12.2)16 (11.9)6 (27.3)
  • All percentages are provided by category of BP. IQR, interquartile range.