Table 1 Characteristics of the patients according to sex.
| Variable | Male | Female | p Value |
|---|---|---|---|
| Age (years) | 25.7 (21 to 30) | 29.9 (26 to 33) | 0.142 |
| White blood cells (×109/l) | 10.48 (7.77 to 13.20) | 10.01 (8.35 to 11.67) | 0.803 |
| Red blood cells (×1012/l) | 4.13 (3.69 to 4.57) | 3.62 (3.39 to 3.85) | 0.017 |
| Hb (g/l) | 105 (97 to 113) | 98. (94 to 103) | 0.074 |
| Hct (l/l) | 0.33 (0.30 to 0.35) | 0.29 (0.28 to 0.31) | 0.004 |
| MCV (fl) | 80 (76 to 84) | 81 (78 to 84) | 0.642 |
| MCH (pg) | 27 (25 to 29) | 27 (26 to 28) | 0.574 |
| RDW (%) | 19 (17 to 20) | 17. (16 to 19) | 0.442 |
| Platelets (×109/l) | 307 (234 to 381) | 355 (276 to 435) | 0.427 |
| HbF (%) | 18 (13 to 23) | 15 (12 to 19) | 0.466 |
| HbS (%) | 77 (72 to 82) | 75 (70 to 81) | 0.516 |
| HbA2 (%) | 3 (3 to 4) | 3 (2. to 3) | 0.518 |
| Fasting blood sugar (mmol/l) | 5.6 (4.3 to 6.7) | 5.8 (4.7 to 6.9) | 0.767 |
| Plasma total protein (g/l) | 73 (70 to 76) | 71 (67 to 75) | 0.483 |
| Plasma albumin (g/l) | 42 (40 to 44) | 39 (36 to 42) | 0.109 |
| Plasma urea (mmol/l) | 3.1 (2.5 to 3.6) | 2.6 (2.2 to 3.0) | 0.132 |
| Plasma creatinine (μmol/l) | 67 (56 to 79) | 52 (46 to 58) | 0.016 |
| Cystatin C (mg/l) | 1.15 (0.98 to 1.32) | 1.13 (0.95 to 1.31) | 0.845 |
| β2‐microglobulin (mg/l) | 2.72 (2.41 to 3.03) | 2.64 (2.33 to 2.94) | 0.767 |
| 24 h urine protein (mg/24 h) | 181 (47 to 315) | 151 (58 to 243) | 0.617 |
| Measured Ccr (ml/min) | 120 (87 to 153) | 108 (88 to 129) | 0.508 |
| Cockcroft‐Gault GFR (ml/min) | 152 (132 to 171) | 154 (132 to 176) | 0.862 |
| MDRD GFR (mL/min/1.73 m2) | 122 (95 to 150) | 144 (120 to 169) | 0.22 |
| Calculated cystatin C clearance | 83 (72 to 95) | 106 (88 to 124) | 0.031 |
| (ml/min/1.73 m2) |
Values are mean (95% confidence interval).
Ccr, creatinine clearance; GFR, glomerular filtration rate; Hb, haemoglobin; Hct, haematocrit; MCH, mean cell haemoglobin; MCV, mean cell volume; MDRD, modified Modification of Diet in Renal Disease; RDW, red cell distribution width.