Table 1

Baseline clinical and biochemical characteristics of 668 Faroese septuagenarians by vitamin D status

Variable25(OH)D <50 nmol/L25(OH) ≥50 nmol/LP value
Women, n (%)157 (43.9)170 (54.8)0.005
Age (years)72.5 (1.17)72.4 (1.07)0.533
Systolic blood pressure (mmHg)151 (21.5)148 (21.3)0.125
Waist (cm)103.1 (40.31)97.2 (15.25)0.021
Weight (kg)83.4 (14.98)78.1 (14.71)<0.001
BMI (kg/m2)29.5 (4.75)28.2 (4.44)<0.001
Plasma glucose (mmol/L)5.6 (4.8–6.1)5.4 (4.9–6.1)0.671
HbA1c (mmol/mol)*42.1 (38.80–46.45)41.0 (38.80–44.26)0.007
Plasma insulin (pmol/L)40 (27–61)38 (26–53)0.034
HOMA-IR9.8 (6.1–15.8)9.0 (6.1–13.4)0.035
HOMA-B40.7 (27.2–58.3)39.8 (26.3–54.1)0.042
Triacylglyceride (mmol/L)1.5 (0.70)1.5 (0.77)0.657
HDL-cholesterol (mmol/L)1.5 (0.35)1.6 (0.37)0.003
Total PCB (μg/g lipid)8.9 (4.8–14.7)8.0 (4.7–13.4)0.195
  • Data are means (SD) or median (25–75th percentile).

  • *HbA1c (IFCC) mmol/mol can be converted to HbA1c (DCCT) % by the following equation: HbA1c (DCCT) % = 0.0915 × HbA1c (IFCC) mmol/mol + 2.15;

  • †HOMA-IR = (fasting plasma insulin × fasting plasma glucose)/22.5;

  • ‡HOMA-% = (20 × fasting plasma insulin)/(fasting plasma glucose × 3.5);

  • ‡sum of major PCB congeners CB-138, CB-153, and CB-180 multiplied by 2 (12).