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. 2018 Mar 22;2018:5107589. doi: 10.1155/2018/5107589

Table 2.

Baseline characteristics by level of the insulinogenic index.

Positive insulinogenic index Nonpositive insulinogenic index
Insulinogenic index ≥ 0.4
(n = 828)
Insulinogenic index < 0.4
(n = 561)
ΔGlu0–30 ≤ 0
(n = 42)
ΔIns0–30 ≤ 0
(n = 30)
Age (years) 51.6 ± 7.0 52.9 ± 6.7 50.6 ± 7.1 50.2 ± 8.5
Male gender (%) 65.3 79.5 42.9 63.3
Body mass index (kg/m2) 24.3 ± 3.3 23.6 ± 2.9 22.4 ± 2.7 24.8 ± 4.3‡
Fasting plasma glucose (mg/dL) 92/96/101 94/99/106 88/91/95 92/98/108‡
30 min plasma glucose (mg/dL) 126/143/162 150/168/186 76/81/88 132/163/182‡
1-hour plasma glucose (mg/dL) 106/131/159 146/178/205 72/92/101 112/151/192
2-hour plasma glucose (mg/dL) 96/109/126 105/123/146 81/92/111 90/120/142‡
Fasting insulin (μIU/mL) 3.1/4.3/6.2 2.6/3.3/4.3 2.8/4.2/4.7 2.4/3.3/6.2
30 min insulin (μIU/mL) 29.2/40.2/58.3 13.7/19.1/24.1 13.7/20.1/32.9 0.8/1.4/2.1†‡
120 min insulin (μIU/mL) 16.3/24.6/39.7 14.5/21.5/34.9 9.1/15.3/21.9 10.6/23.0/39.1
HbA1c (%) 5.2 ± 0.3 5.3 ± 0.4 5.1 ± 0.3† 5.3 ± 0.4
Glucose tolerance
 Normal glucose tolerance (%) 62.2 39.4 92.9 46.7‡
 Impaired fasting glucose (%) 32.1 49.8 7.2 43.3
 Impaired glucose tolerance (%) 13.2 30.9 2.4 30.0
Current smokers (%) 17.5 25.0 19.0 20.0
Drinkers (%) 59.9 71.3 42.9† 63.3
Antihypertensive medications (%) 13.6 14.6 7.1 10.0
Lipid-lowering medications (%) 6.9 7.3 2.4 6.7

Data are expressed as mean ± standard deviation, 25/50/75th percentile values, or %. Characteristics among groups were compared using one-way ANOVA for continuous variables and chi-square tests for categorical variables with Bonferroni correction for multiple comparisons. p < 0.05 compared to insulinogenic index ≥ 0.4, †p < 0.05 compared to insulinogenic index < 0.4, ‡p < 0.05 compared to ΔGlu0–30 ≤ 0. ΔGlu0–30 and ΔIns0–30, change in glucose and in insulin, respectively, over the first 30 min on the oral glucose tolerance test.