Table 2.
Baseline characteristics of NHANES children and adolescents, 1999–2004.
| Characteristic | Healthy participants, n = 5250a | Excluded participants, n = 3610a | Overall, N = 8860a |
|---|---|---|---|
| Age at examination (years) | 13.0 (9.0, 16.0) | 13.0 (10.0, 17.0) | 13.0 (9.0, 16.0) |
| Gender | |||
| Male | 2639 (50%) | 1831 (51%) | 4470 (50%) |
| Female | 2611 (50%) | 1779 (49%) | 4390 (50%) |
| Race/Ethnicity | |||
| Mexican American | 1737 (33%) | 1335 (37%) | 3072 (35%) |
| Other Hispanic | 219 (4.2%) | 154 (4.3%) | 373 (4.2%) |
| Non-Hispanic White | 1501 (29%) | 831 (23%) | 2332 (26%) |
| Non-Hispanic Black | 1575 (30%) | 1157 (32%) | 2732 (31%) |
| Other Race—Including Multiracial | 218 (4.2%) | 133 (3.7%) | 351 (4.0%) |
| NT-proBNP (ng/L) | 36 (18, 65) | 32 (16, 56) | 34 (17, 61) |
| BMI category | |||
| Underweight | — | 273 (7.6%) | 273 (3.1%) |
| Normal weight | 5250 (100%) | 179 (5.0%) | 5429 (61%) |
| Overweight | — | 1439 (40%) | 1439 (16%) |
| Obese | — | 1590 (44%) | 1590 (18%) |
| Missing | — | 129 (3.6%) | 129 (1.5%) |
| Reported any hematologic or cardiovascular medication | — | 55 (1.5%) | 55 (0.6%) |
| History of hypertension | — | 120 (3.3%) | 120 (1.4%) |
| Prescribed antihypertensive medication | — | 18 (0.5%) | 18 (0.2%) |
| History of diabetes | — | 27 (0.7%) | 27 (0.3%) |
| Hemoglobin A1c ≥6.5 | — | 25 (0.7%) | 25 (0.3%) |
| eGFR <60 mL/min/1.73 m2 | — | 2 (<0.1%) | 2 (<0.1%) |
| Receiving anemia treatment | — | 136 (3.8%) | 136 (1.5%) |
This table displays the baseline characteristics of 8860 children and adolescents who participated in the combined NHANES cycles from 1999–2004, divided into healthy and excluded participants. The proportion of individuals belonging to each characteristic are given in parentheses. The median age and NT-proBNP concentrations are displayed, along with the interquartile interval in parentheses (25th, 75th).
Median (25th, 75th percentiles); n (%)