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Table 2 Sample characteristics of the 500 participants

From: Vitamin D, parathyroid hormone and metabolic syndrome – the PORMETS study

  Total Women Men p valuea
Age (years) - median (P25, P75) 53 (41, 67) 52 (40, 66) 56 (45, 68) 0.072
25(OH)D (ng/mL) - median (P25, P75) 13.8 (9.7,17.6) 13.8 (9.7, 17.5) 13.7 (9.9, 17.9) 0.681
25(OH)D (ng/mL) / UV exposure - median (P25, P75)
 Low UV 13.4 (9.3, 17.5) 13.4 (9.3, 16.6) 13.2 (9.0, 17.9)  
 High UV 14.3 (10.0, 18.3)b 14.1 (9.9, 18.6) 14.5 (10.2, 17.6) 0.603
VitD adequacy - n (%)
 Deficiency 181 (37.7) 102 (37.5) 79 (38.0)  
 Inadequacy 230 (47.9) 133 (48.9) 97 (46.6)  
 Sufficiency 69 (14.4) 37 (13.6) 32 (15.4) 0.821
PTH (pg/mL) - median (P25, P75) 38.1 (29.8, 49.2) 38.6 (29.8, 50.1) 37.8 (30.0, 47.7) 0.375
“Blunted PTH response” – n (%)
 No 20 (10.8) 16 (15.4) 4 (4.9)  
 Yes 165 (89.2) 88 (84.6) 77 (95.1) 0.023
PTH status – n (%)
 Hypoparathyroidism 4 (0.8) 0 (0) 4 (1.9)  
 Normal status 449 (89.8) 254 (88.8) 195 (91.1)  
 Hyperparathyroidism 47 (9.4) 32 (11.2) 15 (7.0) 0.021
BMI classification - n (%)
 Underweight 6 (1.2) 5 (1.7) 1 (0.5)  
 Normal range 159 (31.9) 94 (32.9) 65 (30.5)  
 Pre-obese 213 (42.7) 113 (39.5) 100 (46.9)  
 Obese 121 (24.2) 74 (25.9) 47 (22.1) 0.242
Metabolic syndrome - n (%)
 No 307 (61.6) 169 (59.3) 138 (64.8)  
 Yes 191 (38.4) 116 (40.7) 75 (35.2) 0.213
  1. SD standard deviation, 25(OH)D 25-hydroxyvitamin D, VitD vitamin D, UV ultraviolet, low UV period December–May, high UV period June–November, PTH parathyroid hormone, BMI body mass index
  2. aChi-square test/Fisher’s exact test or Mann-Whitney U test p value; b p value <0.001 for the comparison of the mean levels of 25(OH)D according to meteorological periods