Table 1. Characteristics of the US population represented by the NHANES 1999–2010, 2003–2006 and 1999–2004 cohorts.
| 1999–2010 | 2003–2006 | 1999–2004 | |
| N | 19,383 | 6,005 | 7,384 |
| Age, y, mean (SE) | 44.8 (0.3) | 45.2 (0.4) | 41.4 (0.3) |
| Male, % (SE) | 50.3 (0.3) | 50.2 (0.7) | 50.9 0.7) |
| Race, % (SE) | |||
| Nonhispanic White | 76.8 (1.1) | 76.4 (2.2) | 77.3 (1.3) |
| Nonhispanic Black | 9.7 (0.6) | 10.4 (1.3) | 9.8 (0.9) |
| Hispanic | 8.0 (0.7 | 7.9 (1.1) | 7.8 (1.0) |
| Other | 4.9 (0.3) | 5.0 (0.6) | 4.5 (0.5) |
| BMI, kg/m2, mean (SE) | 28.3 (0.1) | 28.2 (0.2) | 27.8 (0.1) |
| Systolic BP, mmHg, mean (SE) | 121.4 (0.2) | 122.3 (0.4) | 120.8 (0.4) |
| Diastolic BP, mmHg, mean (SE) | 71.6 (0.2) | 71.3 (0.3) | 72.7 (0.2) |
| Diabetes, % (SE) | 6.2 (0.2) | 6.0 (0.4) | 4.3 (0.3) |
| Cardiovascular disease, % (SE) | 4.5 (0.2) | 4.9 (0.4) | 3.9 (0.3) |
| Smoking, % (SE) | 29.8 (0.6) | 31.4 (1.1) | 32.6 (1.1) |
| eGFR, ml/min/1.73 m2, mean (SE) | 96.8 (0.3) | 96.1 (0.6) | 98.4 (0.5) |
| Serum phosphorus, mg/dL, mean (SE) | 3.71 (0.01) | 3.83 (0.01) | 3.65 (0.01) |
| 24 h phosphorus intake, mg, mean (SE) | 1393 (7) | 1383 (16) | 1387 (13) |
| Serum calcium, mg/dL, mean (SE) | 9.47 (0.01) | 9.54 (0.01) | 9.48 (0.02) |
| PTH, pg/mL, median (IQR) | NA | 38 (21) | NA |
| Total ALP, U/L, median (IQR) | 66 (26) | 64 (24) | 67 (27) |
| 25(OH) vitamin D, ng/mL, mean (SE) | NA | 24.0 (0.4) | NA |
| BAP, ug/L, median (IQR) | NA | NA | 13.8 (6.8) |
| ACR, mg/g, median (IQR) | 5.8 (6.2) | 5.9 (6.2) | 5.6 (5.9) |
| Urine albumin, mg/L, median (IQR) | 6.8 (9.1) | 6.9 (9.3) | 6.9 (9.5) |
| Moderate albuminuria, % (SE) | 10.2 (0.3) | 10.1 (0.4) | 9.4 (0.5) |
Data are given as mean (standard deviation) or median (interquartile range) for parametric and non-parametrically distributed variables respectively. N/A, not available.
SE, standard error; IQR, interquartile range.