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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: Am J Kidney Dis. 2012 Apr 10;60(2):217–224. doi: 10.1053/j.ajkd.2012.01.024

Table 1.

Subject Characteristics at baseline

Pooled
(N=3531)		 MDRD
(N=840)		 AASK
(N=1094)		 CSG
(N=360)		 DCCT
(N=1237)
Age, years 43 ± 15 52 ± 12 55 ± 11 34 ± 8 30 ± 7
Female 1491 (42%) 332 (40%) 424 (39%) 169 (47%) 566 (46%)
Black 1226 (35%) 66 (8%) 1094 (100%) 24 (7%) 42 (3%)
Diabetes 1640 (46%) 43 (5%) 0 (0%) 360 (100%) 1237 (100%)
BMI, kg/m2 27 ± 5 27 ± 5 31 ± 7 25 ± 4 25 ± 3
BSA m2 1.9 ± 0.2 1.9 ± 0.2 2.0 ± 0.2 1.8 ± 0.2 1.9 ± 0.2
Serum creatinine, mg/dL 1.5 ± 0.8 2.2 ± 0.9 1.8 ± 0.6 1.2 ± 0.5 0.8 ± 0.1
mGFR, mL/min/1.73 m2 73 ± 43 33 ± 12 46 ± 13 75 ± 33 124 ± 22
eGFR, mL/min/1.73 m2 73 ± 38 36 ± 14 50 ± 16 77 ± 28 117 ± 13

Values are mean ± SD or n (%). eGFR calculated using the CKD-EPI equation.

Conversion factors for units: serum creatinine in mg/dL to micromol/L, ×88.4; GFR in ml/min/1.73 m2 to ml/s/1.73 m2, ×0.01667.

MDRD - Modification of Diet in Renal Disease; AASK - African American Study of Kidney Disease and Hypertension; CSG - Collaborative Study Group; DCCT - Diabetes Control and Complications Trial; eGFR, estimated glomerular filtration rate; mGFR, measured glomerular filtration rate; BSA, body surface area; BMI, body mass index.