Characteristics of the study population
| Overall population | Normal glucose tolerance | IFG only | IGT only | IFG and IGT | Diabetes | |
|---|---|---|---|---|---|---|
| n | 254 | 152 | 46 | 36 | 17 | 3 |
| 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 | ||||||
| Female | 52.4 (133) | 55.9 (85) | 45.7 (21) | 55.6 (20) | 35.3 (6) | 33.3 (1) |
| Male | 47.6 (121) | 44.1 (67) | 54.3 (25) | 44.4 (16) | 64.7 (11) | 66.7 (2) |
| Race | ||||||
| White | 59.1 (150) | 63.2 (96) | 47.8 (22) | 50.0 (18) | 70.6 (12) | 66.7 (2) |
| Black | 29.9 (76) | 27.0 (41) | 45.7 (21) | 33.3 (12) | 5.9 (1) | 33.3 (1) |
| Other | 11.0 (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* | ||||||
| Yes | 76.2 (166) | 70.5 (93) | 84.2 (32) | 81.3 (26) | 92.9 (13) | — |
| No | 23.8 (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) |
| Prepubertal | 6.6 (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) |