Table 3.
Distribution of study population by mean estimated GFR categories.
| Equation | Distribution* n, % | |||||
|---|---|---|---|---|---|---|
| Estimated GFR categories (mL/min/1.73 m2) | eGFR <60 | |||||
| >90 | 60–90 | 30–60 | 15–30 | ≤15 | ||
| Creatinine 2009 (age, sex, and race) | 1495, 52.0 | 1177, 40.9 | 191, 6.6 | 11, 0.4 | 3, 0.1 | 205, 7.1 |
| Cystatin C 2012 (age and sex) | 1162, 40.4 | 1295, 45.0 | 395, 13.7 | 22, 0.8 | 3, 0.1 | 420, 14.6 |
| Creatinine-cystatin C 2012 (age, sex, and race) | 1271, 44.2 | 1340, 46.6 | 248, 8.6 | 15, 0.5 | 3, 0.1 | 276, 9.2 |
| Average of creatinine 2009 and cystatin C 2012 | 1253, 43.6 | 1371, 47.7 | 238, 8.3 | 12, 0.4 | 3, 0.1 | 253, 8.8 |
| Spline Log cystatin C | 1384, 48.1 | 1184, 41.2 | 289, 10.1 | 18, 0.6 | 2, 0.1 | 309, 10.8 |
| Spline Log cystatin C—age, sex, and race | 1125, 39.1 | 1317, 45.8 | 410, 14.3 | 22, 0.8 | 3, 0.1 | 435, 15.2 |
| Spline Log cystatin C—age, sex, and diabetes | 1249, 43.4 | 1271, 44.2 | 338, 11.8 | 17, 0.6 | 2, 0.1 | 357, 12.5 |
| Spline Log cystatin C—age, sex, and weight | 1072, 37.3 | 1341, 46.6 | 438, 15.2 | 23, 0.8 | 3, 0.1 | 464, 16.1 |
*Distribution reported as frequency count, n; percentage, %.