Table 1.
Demographic characteristics of the patients included in the study
| Characteristics | 24hP <0.5 g/day | 24hP 0.5–0.99 g/day | 24hP 1–1.99 g/day | 24hP ≥2.0 g/day | Total |
|---|---|---|---|---|---|
| Number of samples (%) | 662 (53.7 %) | 266 (21.6 %) | 171 (13.9 %) | 174 (14.1 %) | 1233 (100 %) |
| Number of patients (%) | 208 (64.6 %) | 42 (13.0 %) | 29 (9 %) | 43 (13.3 %) | 322 (100 %) |
| Females, n (%) | 177 (85.1 %) | 32 (76.2 %) | 23 (79.3 %) | 37 (86.0 %) | 269 (83.5 %) |
| Males, n (%) | 31 (14.9 %) | 10 (23.8 %) | 6 (20.7 %) | 6 (14.0 %) | 53 (16.5 %) |
| Whites, n (%) | 118 (56.7 %) | 23 (54.8 %) | 11 (37.9 %) | 21 (48.8 %) | 173 (53.7 %) |
| Blacks, n (%) | 37 (17.8 %) | 7 (16.7 %) | 6 (20.7 %) | 12 (27.9 %) | 62 (19.3 %) |
| Asians, n (%) | 21 (10.1 %) | 6 (14.3 %) | 5 (17.2 %) | 4 (9.3 %) | 36 (11.2 %) |
| Other ethnicities, n (%) | 32 (15.4 %) | 6 (14.3 %) | 7 (24.1 %) | 6 (14.0 %) | 51 (15.8 %) |
| Disease duration, yr (SD) | 13.02 ± 10.38 | 8.90 ± 6.23 | 11.54 ± 9.49 | 8.61 ± 8.07 | 11.76 ± 9.71 |
| Age at first 24hP, yr (SD) | 42.26 ± 14.88 | 37.02 ± 16.14 | 38.33 ± 13.66 | 35.05 ± 11.58 | 40.26 ± 14.76 |
| Serum creatinine, μmol/L (SD) | 84.39 ± 47.30 | 87.76 ± 42.56 | 87.76 ± 42.56 | 80.49 ± 58.02 | 84.18 ± 47.03 |
| Patients taking prednisone, n (%) | 79 (62.7 %) | 22 (59.5 %) | 16 (59.3 %) | 31 (77.5 %) | 148 (64.3 %) |
| Patients taking immunosuppressives, n (%) | 70 (55.6 %) | 25 (67.6 %) | 14 (51.9 %) | 28 (70.0 %) | 137 (59.6 %) |
24hP Protein content in a 24-h urine collection sample