Table 1.

Clinical and demographic characteristics of the study population

CharacteristicAll (n = 139)Serum ISP Value
1st Tertile (n = 46)2nd Tertile (n = 46)3rd Tertile (n = 47)
Age (yr)67 ± 1268 ± 1066 ± 1467 ± 130.798
Male gender [n (%)]84 (60)26 (56)31 (67)27 (57)0.496
Body mass index (kg/m2)28 ± 628 ± 630 ± 727 ± 50.107
Diabetes mellitus [n (%)]58 (42)23 (50)21 (46)14 (30)0.114
Smoking habit [n (%)]55 (40)15 (33)24 (54)16 (34)0.068
Presence of CVD [n (%)]45 (32)16 (35)10 (22)19 (40)0.143
Systolic arterial pressure (mmHg)153 ± 26148 ± 25156 ± 28155 ± 260.298
Diastolic arterial pressure (mmHg)81 ± 1280 ± 1283 ± 1280 ± 130.278
CKD stage [n (%)]<0.0001
    211 (8)11 (24)0 (0)0 (0)
    337 (26.5)24 (52.5)13 (28)0 (0)
    437 (26.5)6 (13)27 (59)4 (8)
    510 (7)2 (4)3 (6.5)5 (11)
    5D44 (32)3 (6.5)3 (6.5)38 (81)
  • Data are expressed as mean ± SD or, for binary variables, number (frequency). Tertiles are ordered from low serum IS levels to high levels: 1st tertile <0.26 mg/100 ml; 2nd tertile ≥0.26 mg/100 ml and <0.76 mg/100 ml; and 3rd tertile ≥0.76 mg/100 ml.