Table 1

Characteristics of the study population

Overall populationNormal glucose toleranceIFG onlyIGT onlyIFG and IGTDiabetes
n2541524636173
Age (years), mean (SD)13.6 (2.1)13.6 (2.2)14.0 (1.9)13.5 (2.0)13.0 (1.9)12.1 (2.2)
Sex
 Female52.4 (133)55.9 (85)45.7 (21)55.6 (20)35.3 (6)33.3 (1)
 Male47.6 (121)44.1 (67)54.3 (25)44.4 (16)64.7 (11)66.7 (2)
Race
 White59.1 (150)63.2 (96)47.8 (22)50.0 (18)70.6 (12)66.7 (2)
 Black29.9 (76)27.0 (41)45.7 (21)33.3 (12)5.9 (1)33.3 (1)
 Other11.0 (28)9.8 (15)6.5 (3)16.7 (6)23.5 (4)
Weight status
 Overweight (BMI ≥85th percentile and <95th percentile)21.6 (55)25.7 (39)19.6 (9)8.3 (3)17.7 (3)33.3 (1)
 Obese (BMI ≥95th percentile)78.4 (199)74.3 (113)80.4 (37)91.7 (33)82.3 (14)66.7 (2)
Family history of type 2 diabetes*
 Yes76.2 (166)70.5 (93)84.2 (32)81.3 (26)92.9 (13)
 No23.8 (52)29.5 (39)15.8 (6)18.7 (6)7.1 (1)100.0 (2)
Tanner stage**
 Median (range)4 (1–5)4 (1–5)4 (1–5)4 (1–5)3 (1–5)1.5 (1–2)
 Prepubertal6.6 (13)6.8 (8)2.9 (1)6.7 (2)8.3 (1)50.0 (1)
 Pubertal (Tanner stage 2 or higher)93.4 (184)93.2 (110)97.1 (34)93.3 (28)91.7 (11)50.0 (1)
  • Data are % (n) unless otherwise noted.

  • *For those with self-reported family history.

  • **For those with self-reported pubertal measures.