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Table 1 Descriptive characteristics of the study population

From: Serum 25-hydroxyvitamin D3, parathyroid hormone and blood pressure in an elderly cohort from Germany: a cross-sectional study

  Women (n= 90) Men (n= 42)  
  Median P 5 , P 95 Median P 5 , P 95 P a)
Age (y) 75.5 68.0-86.5 76.0 70.0-84.7 0.321
Body mass index (kg/m2) 26.9 21.1-34.5 26.3 22.9-32.3 0.456
Waist circumference (cm) 90.0 71.6-108.4 99.0 84.6-113.7 < 0.0001
Waist-to-hip ratio 0.85 0.75-0.93 0.95 0.86-1.06 < 0.0001
Total body fat (%) 42.4 32.6-50.2 28.9 21.6-37.9 < 0.0001
25(OH)D3 (nmol/L) 59.4 40.5-90.6 66.9 39.9-88.8 0.132
iPTH (pmol/L) 4.5 2.3-7.4 4.1 1.8-8.3 0.315
Systolic blood pressure (mmHg) 140.0 110.0-167.8 130.0 110.0-181.9 0.327
Diastolic blood pressure (mmHg) 72.0 60.0-90.0 70.0 60.0-92.4 0.172
eGFR (mL/min/1.73 m2) 56.2 43.1-71.3 63.7 46.5-80.4 < 0.0001
Vitamin D intake (μg/d) 2.5 0.3-10.1 3.3 1.0-11.3 0.149
Calcium intake (g/d) 1.0 0.5-1.7 1.0 0.6-1.6 0.961
Alcohol intake (g/d) 2.3 0.0-16.1 5.5 0.0-30.0 0.013
Sun exposure (min/d) 120.0 40.0-360.0 150.0 23.8-394.0 0.071
Physical activity level 1.7 1.5-1.9 1.6 1.4-1.9 0.319
Current or ex-smokers, n (%) 21 23.3 30 71.4 < 0.0001
Vitamin D supplement users, n (%) 13 14.4 2 4.8 0.143
Elevated blood pressure, n (%)b) 38 42.2 15 35.7 0.569
Antihypertensive drugs, n (%) 55 61.1 24 57.1 0.706
  1. Abbreviations: P5, 5th percentile; P95, 95th percentile; 25(OH)D3, 25-hydroxyvitamin D3; iPTH, intact parathyroid hormone; eGFR, estimated glomerular filtration rate.
  2. a) Mann-Whitney U test for continuous variables and χ2 test for categorical variables.
  3. b) Elevated blood pressure was defined as SBP > 140 mmHg and/or DBP > 90 mmHg.