Table 1.
Baseline characteristics of NHANES adults, 1999–2004.
| Characteristic | Healthy participants, n = 1949a | Excluded participants, n = 10 397a | Overall, N = 12 346a |
|---|---|---|---|
| Age at examination (years) | 34 (25, 45) | 52 (36, 68) | 48 (33, 66) |
| Gender | |||
| Male | 944 (48%) | 4955 (48%) | 5899 (48%) |
| Female | 1005 (52%) | 5442 (52%) | 6447 (52%) |
| Race/ethnicity | |||
| Mexican American | 426 (22%) | 2365 (23%) | 2791 (23%) |
| Other Hispanic | 88 (4.5%) | 478 (4.6%) | 566 (4.6%) |
| Non-Hispanic White | 1012 (52%) | 5339 (51%) | 6351 (51%) |
| Non-Hispanic Black | 322 (17%) | 1881 (18%) | 2203 (18%) |
| Other race—including multiracial | 101 (5.2%) | 334 (3.2%) | 435 (3.5%) |
| NT-proBNP (ng/L) | 38 (19, 71) | 55 (25, 135) | 51 (24, 119) |
| BMI category | |||
| Underweight | — | 179 (1.7%) | 179 (1.4%) |
| Normal weight | 1949 (100%) | 1675 (16%) | 3624 (29%) |
| Overweight | — | 4332 (42%) | 4332 (35%) |
| Obese | — | 3871 (37%) | 3871 (31%) |
| Missing | — | 340 (3.3%) | 340 (2.8%) |
| Reported any hematologic or cardiovascular medication | — | 3587 (35%) | 3587 (29%) |
| History of hypertension | — | 3899 (38%) | 3899 (32%) |
| Prescribed antihypertensive medication | — | 3171 (30%) | 3171 (26%) |
| History of hypercholesterolemia | — | 3344 (32%) | 3344 (27%) |
| Prescribed hypercholesterolemia medication | — | 1789 (17%) | 1789 (14%) |
| History of diabetes | — | 1207 (12%) | 1207 (9.8%) |
| Hemoglobin A1c ≥6.5 | — | 1102 (11%) | 1102 (8.9%) |
| History of kidney disease | — | 344 (3.3%) | 344 (2.8%) |
| eGFR <60 mL/min/1.73 m2 | — | 757 (7.3%) | 757 (6.1%) |
| Receiving dialysis | — | 13 (0.1%) | 13 (0.1%) |
| Receiving anemia treatment | — | 423 (4.1%) | 423 (3.4%) |
| History of congestive heart failure | — | 389 (3.7%) | 389 (3.2%) |
| History of coronary heart disease | — | 555 (5.3%) | 555 (4.5%) |
| History of angina | — | 459 (4.4%) | 459 (3.7%) |
| History of myocardial infarction | — | 575 (5.5%) | 575 (4.7%) |
| History of stroke | — | 419 (4.0%) | 419 (3.4%) |
| History of emphysema or bronchitis | — | 913 (8.8%) | 913 (7.4%) |
| History of liver disease | — | 390 (3.8%) | 390 (3.2%) |
| History of cancer | — | 1060 (10%) | 1060 (8.6%) |
This table displays the baseline characteristics of 12 346 adults who participated in the combined NHANES cycles from 1999–2004, divided into apparently 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 (%).