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Table 1 Characteristics of study population (n = 1471)

From: Prevalence and determinants of chronic kidney disease in community-dwelling elderly by various estimating equations

Age, mean (SD) years 75.6 (6.56)
n (%) 65-69 351 (23.9)
  70-79 673 (45.8)
  ≥80 447 (30.4)
Gender, n (%) male 836 (56.8)
  female 635 (43.2)
Family status, n (%) married 960 (65.5)
  widowed 362 (24.7)
Duration of school education, ≤9 yrs 849 (58.6)
n (%) 10-11 yrs 334 (23.1)
  ≥12 yrs 266 (18.4)
Alcohol consumption, n (%) daily 448 (31.0)
  several time per week or month 741 (51.3)
  <1 time per month 243 (16.8)
  never 12 (0.8)
Smoking status, n (%) smoker 136 (9.3)
  former smoker 601 (41.0)
  never-smoker 729 (49.7)
Body Mass Index, mean (SD) kg/m2 27.6 (4.16)
  ≥30 kg/m2, n (%) 356 (24.2)
History of co-morbidity n (%) hypertension 784 (53.3)
  myocardial infarct 127 (8.6)
  heart failure 213 (14.5)
  chronic kidney disease 43 (2.9)
  diabetes 197 (13.4)
Creatinine a mg/dL 0.98 (0.87; 1.14)
Cystatin C a mg/L 0.88 (0.77; 1.03)
C-reactive protein a mg/L 1.70 (0.89; 3.70)
  1. amedian (interquartile range, Q1, Q3).