Table 1. Characteristics of the US adolescents aged 12–17 years.
| Characteristics | All (n = 3621) | Boys (n = 1868) | Girls (n = 1753) | P value# |
|---|---|---|---|---|
| Age, years | 15.0 (0.1) | 15.0 (0.1) | 15.1 (0.1) | 0.524 |
| Weight, kg | 63.2 (0.4) | 65.8 (0.6) | 60.5 (0.6) | <0.001 |
| Height, cm | 165.5 (0.2) | 169.4 (0.4) | 161.5 (0.3) | <0.001 |
| BMI, kg/m2 | 22.9 (0.1) | 22.7 (0.2) | 23.1 (0.2) | 0.124 |
| WC, cm | 79.8 (0.3) | 79.8 (0.5) | 79.7 (0.5) | 0.924 |
| SBP, mmHg | 108.5 (0.3) | 111.0 (0.4) | 105.9 (0.3) | <0.001 |
| DBP, mmHg | 60.5 (0.4) | 59.4 (0.4) | 61.8 (0.5) | <0.001 |
| TG, mg/dl | 84.7 (1.4) | 86.6 (2.4) | 82.9 (1.6) | 0.194 |
| HDL-C, mg/dl | 51.8 (0.3) | 50.0 (0.4) | 53.6 (0.4) | <0.001 |
| FPG, mg/dl | 93.2 (0.3) | 95.2 (0.5) | 91.2 (0.3) | <0.001 |
| LDL-C, mg/dl | 89.1 (0.5) | 88.7 (1.0) | 89.5 (0.7) | <0.001 |
| Race/ethnicity | 0.408 | |||
| Mexican American | 1143 (11.7) | 570 (12.2) | 573 (11.2) | |
| Other Hispanic | 214 (5.7) | 112 (6.0) | 102 (5.4) | |
| Non-Hispanic White | 993 (61.6) | 502 (60.0) | 491 (63.2) | |
| Non-Hispanic Black | 1053 (14.2) | 570 (14.2) | 483 (14.2) | |
| Others | 218 (6.8) | 114 (7.6) | 104 (6.0) | |
| CV risk factors | ||||
| IDF criteria* | ||||
| High BP, % | 109 (2.8) | 92 (4.9) | 17 (0.7) | <0.001 |
| High TG, % | 271 (7.7) | 151 (8.4) | 120 (7.0) | 0.248 |
| Low HDL-C, % | 642 (17.9) | 315 (17.7) | 327 (18.1) | 0.789 |
| High FPG, % | 552 (16.0) | 389 (21.6) | 163 (10.4) | <0.001 |
| High LDL-C, % | 1080 (28.9) | 537 (27.4) | 543 (30.3) | 0.207 |
| ATPIII criteria* | ||||
| High BP, % | 556 (14.4) | 411 (21.2) | 145 (7.6) | <0.001 |
| High TG, % | 687 (19.8) | 378 (21.6) | 309 (18.0) | 0.055 |
| Low HDL, % | 578 (16.5) | 358 (20.1) | 220 (12.9) | <0.001 |
| High FPG, % | 62 (1.6) | 41 (1.9) | 21 (1.2) | 0.162 |
| High LDL-C, % | 1080 (28.9) | 537 (27.4) | 543 (30.3) | 0.207 |
| CV risk factor clustering | ||||
| IDF criteria* | 0.019 | |||
| None | 1746 (48.5) | 870 (46.4) | 876 (50.6) | |
| 1 | 1274 (35.5) | 634 (35.2) | 640 (35.7) | |
| 2 | 451 (11.9) | 267 (13.1) | 184 (10.8) | |
| ≥3 | 140 (4.1) | 91 (5.4) | 49 (2.9) | |
| ATPIII criteria* | <0.001 | |||
| None | 1714 (48.3) | 816 (44.4) | 898 (52.2) | |
| 1 | 1138 (30.6) | 582 (31.2) | 556 (30.0) | |
| 2 | 522 (14.5) | 300 (15.0) | 222 (13.9) | |
| ≥3 | 237 (6.6) | 164 (9.3) | 73 (3.9) | |
BMI, body mass index; WC, waist circumference; SBP, systolic blood pressure; DBP, diastolic blood pressure; TG, triglyceride; HDL-C, high density lipoprotein-cholesterol; FPG, fasting plasma glucose; IDF, International Diabetes Federation; ATP III, Adult Treatment Panel III.
Data are expressed as mean and standard error (SE) or n (%).
*Exclusion of WC and inclusion of LDL-C.
#Difference between boys and girls, t test for continuous variables and Chi-squared test for category variables.