Table 2.

Characteristics of the study population dependent on tertile of age

Tertile 1 (age 34 to 48 years)Tertile 2 (age 49 to 59 years)Tertile 3 (age 60 to 82 years)All
n1395137013304095
Demographics
    age (years), mean ± SD42 ± 454 ± 368 ± 655 ± 12
    men, n (%)679 (49)675 (49)786 (59)2143 (52)
Educational level, n (%)
    primary school44 (3)107 (8)248 (19)399 (10)
    lower secondary257 (18)407 (30)548 (41)1212 (30)
    higher secondary486 (34)357 (26)278 (21)1105 (27)
    university626 (45)499 (36)256 (19)1382 (33)
Cardiovascular risk factors
    history of vascular events, n (%)25 (2)75 (6)207 (16)307 (8)
    diabetes mellitus, n (%)13 (1)73 (5)169 (13)255 (6)
    hypertension, n (%)133 (10)449 (33)807 (61)1390 (34)
    systolic BP (mmHg), mean ± SD118 ± 13124 ± 16136 ± 19126 ± 18
    diastolic BP (mmHg), mean ± SD70 ± 874 ± 975 ± 973 ± 9
    current smoking, n (%)358 (26)376 (27)238 (18)972 (24)
    body mass index (kg/m2), mean ± SD26 ± 427 ± 528 ± 427 ± 4
    overweight, n (%)704 (51)868 (63)976 (73)2548 (62)
    alcohol use, n (%)1118 (80)1076 (79)929 (70)3123 (76)
    HDL-cholesterol (mmol/L), mean ± SD1.4 ± 0.41.4 ± 0.41.4 ± 0.41.4 ± 0.4
    non-HDL cholesterol (mmol/L), mean ± SD5.2 ± 1.05.6 ± 1.05.4 ± 1.15.4 ± 1.1
Renal variables
    eGFR MDRD (ml/min per 1.73 m2), mean ± SD84 ± 1380 ± 1372 ± 1579 ± 15
        low (<60), n (%)29 (2)72 (5)243 (18)344 (9)
        intermediate (60 to 89), n (%)955 (69)1025 (75)945 (71)2925 (71)
        normal (≥90), n (%)411 (29)273 (20)142 (11)826 (20)
Serum creatinine (μmol/L), mean ± SD82 ± 1483 ± 1490 ± 2285 ± 17
UAE (mg/24 h), median [IQR]8.1 [6.2 to 12.3]9.2 [6.4 to 16.2]12.5 [7.2 to 31.7]9.4 [6.5 to 17.3]
    low (<10), n (%)893 (64)763 (56)547 (41)2203 (54)
    intermediate (10 to 29), n (%)414 (30)439 (32)443 (33)1296 (31)
    elevated (≥30), n (%)88 (6)168 (12)340 (26)596 (15)
RFFT score, mean ± SD83 ± 2570 ± 2352 ± 2069 ± 26
  • MDRD, Modification of Diet in Renal Disease; IQR, interquartile range; UAE, urinary albumin excretion.