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. 2008 Jun 3;295(2):E428–E435. doi: 10.1152/ajpendo.90354.2008

Table 2.

Hormone and substrate concentrations at baseline and during the clamp

Fasting Glucose, mg/dl 2-h Glucose, mg/dl Insulin, μU/ml C-Peptide, ng/ml FFA, μmol/l Glycerol, μmol/l Lactate, mmol/l
Baseline
    NGT 91±1.2 102±6.7 10.0±1.8 2.6±0.2 585±37 88±9 0.7±0.09
    IFG 112±3.0* 93±6.2 11.4±1.3 3.2±0.2* 543±43 101±19 0.5±0.07
    IGT/IFG 111±2.4* 163±4.0 10.0±1.6 2.8±0.2 668±58 105±13 0.9±0.15
Low-dose (4 mU·m2·min−1) clamp
GIR, mg glucose·kg−1·min−1
    NGT 0.31±0.12 93±1.0 11.1±1.8 2.2±0.2 498±40 71±6 0.4±0.04
    IFG 0.00±0.00* 100±2.0* 12.6±0.7 2.6±0.2 491±50 82±10 0.5±0.07
    IGT/IFG 0.00±0.00* 102±1.6* 12.5±1.5 2.3±0.2 496±45 85±9 0.6±0.08
High-dose (40 mU·m2·min−1) clamp
GIR, mg glucose·kg−1·min−1
    NGT 3.8±0.5 89±1.0 76±8 1.3±0.2 59±18 39±6 0.7±0.05
    IFG 4.0±0.6 90±1.3 70±10 1.3±0.2 97±41 45±8 0.6±0.07
    IGT/IFG 3.1±0.5 89±2.7 69±5.4 1.1±0.1 65±19 56±14 0.8±0.10

Values are means ± SE. GIR, glucose infusion rate.

*

P < 0.05 vs. NGT;

P < 0.05 vs. IFG;

P < 0.05 vs. IFG/IGT.