Characteristics Hypertensives n=48 Normotensives n=17 P Age (years) 45±12 50±14 0.23 Sex-ratio (male/female) 1.5 0.43 0.03 Body mass index (kg/m2) 28 26 0.98 Blood pressure   systolic (mm Hg)                          diastolic (mm Hg) 181 ±22 130 ±5 0.001 103 ±12 75 ±5 0.001 Glomerular filtration rate (ml/mn)* 34.3 ±16 40.8 ±10 0.10 Hemoglobin (g/dL) 9.7 10.5 0.86 Proteinuria (g/day) 1.05 0.95 0.76 Left ventricular hypertrophy 100% 60% 0.04 Kidney size (mm)** 153 ±25 145 ±21 0.61 * Estimated by MDRD formula ** Longitudinal diameter at ultrasound examination

Table 1: Clinical and biological parameters and kidney size in hypertensive and normotensive patients.