Table 1.
Descriptive data of the derivation (SSS) and validation population (SKIPOGH), by sex
| SSS | SKIPOGH | |||
|---|---|---|---|---|
| Variables | Men | Women | Men | Women |
| Number | 550 | 587 | 473 | 521 |
| Age (years) | 48.1 (17.2) | 46.2 (16.8) | 47.0 (17.6) | 47.6 (16.7) |
| Weight (kg) | 81.7 (14.2) | 66.3 (13.2)a | 81.5 (12.9) | 65.4 (12.6)a |
| Height (cm) | 176.5 (7.0) | 164.6 (6.7)a | 177.4 (6.8)d | 164.9 (6.4)a |
| BMI (kg/m2) | 26.2 (4.1) | 24.5 (4.8)a | 25.9 (4.1) | 24.1 (4.6)a |
| Hypertension (Number, %) | 180 (32.8) | 100 (17.0)a | 130 (27.5) | 96 (18.5)a |
| Diabetes (Number, %) | 40 (7.3) | 39 (6.6) | 30 (6.3) | 13 (2.5)b |
| Plasma creatinine (μmol/L) | 86.6 (11.5) | 69.0 (8.8)a | 80.2 (11.0)c | 65.8 (9.3)a c |
| eGFR CKD-EPI (ml/min/1.73 m2) | 92.1 (15.4) | 92.0 (16.6) | 99.0 (16.7)c | 95.5 (15.7)a c |
| Duration of urine collection (minutes) | 1442 (65) | 1447 (78) | 1442 (81) | 1436 (76)d |
| Volume of urine collection (ml) | 1928 (876) | 2072 (922) | 1698 (756)c | 1719 (702)c |
| Urinary creatinine excretion (μmol/24 hours) | 15620 (3768) | 9821 (2518)a | 15651 (3413) | 10273 (2383)a c |
| Urinary creatinine excretion (μmol /kg/24 hours) | 193 (41) | 151 (38)a | 194 (42) | 161 (40)a c |
Data are expressed as mean (SD) unless otherwise specified. a P <0.001 compared to men; b P <0.01 compared to men; c P <0.001 compared to SSS; d P <0.05 compared to SSS. SSS: Swiss Survey on Salt.