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Table 1 Demographic characteristics of 1562 study participants: blood donors from all over the Netherlands 2016

From: Risk factors for hepatitis E virus seropositivity in Dutch blood donors

  Overall (n = 1562) Anti-HEV IgG-negative (n = 1074) Anti-HEV IgG-positive (n = 488)
N % N % N %
Total 1562 100 1074 68.8 488 31.2
A. Socio-demographic characteristics
 Gender
  Men 1234 79.0 837 77.9 397 81.4
  Women 328 21.0 237 22.1 91 18.7
 Median age in years (IQR) 58.1 (50.7-63.9) 56.9 (49.6-63.1) 60.2 (54.5-65.4)
 Age groups
   < 30 years of age 24 1.5 20 1.9 4 0.8
  30-40 years of age 75 4.8 68 6.3 7 1.4
  40-50 years of age 255 16.3 194 18.1 61 12.5
  50-60 years of age 561 35.9 392 36.5 169 34.6
   > 60 years of age 647 41.4 400 37.2 247 50.6
 Country of birtha
  The Netherlands 1519 97.8 1041 97.6 478 98.2
  Any other country 35 2.3 26 2.4 9 1.8
 Level of educationb
  Low/intermediate 780 50.3 508 47.7 272 56.1
  High 770 49.7 557 52.3 213 43.9
B. Health-related characteristics
 Previous HEV-test for medical reasonsc
  No 1368 88.4 927 87.2 441 90.9
  Yes 8 0.5 6 0.6 2 0.4
  Unknown 172 11.1 130 12.2 42 8.7
 Health complaints last 2 monthsf
  Fever 56 3.7 39 3.7 17 3.6
  Nausea 54 3.5 41 3.9 13 2.7
  Diarrhea < 3 times/day 125 8.2 83 7.9 42 8.8
  Stomach ache 91 6.0 67 6.4 24 5.0
  Headache 282 18.4 216 20.5 66 13.8
  Tiredness 306 20.1 228 21.7 78 16.4
  Dark urine 73 4.8 52 5.9 21 4.4
  Itching 163 10.6 116 11.0 47 9.8
  Neurological symptoms 75 4.9 51 4.9 24 5.0
 Underlying diseases last 6 monthsf
  High blood pressure 214 13.7 143 13.3 71 14.5
  Diabetes 51 3.3 30 2.8 21 4.3
  High cholesterol 126 8.1 82 7.6 44 9.0
 Alcohol consumptiond
   < =6 drinks per week 938 62.5 661 64.2 277 58.7
   > 7 drinks per week 564 37.6 369 35.8 195 41.3
 Smokinge
  No, never 710 46.8 503 48.4 207 43.4
  Past smoker 665 43.8 445 42.8 220 46.1
  Current smoker 142 9.4 92 8.9 50 10.5
 Traveling history (lifetime)
  Asia 687 44.0 479 44.6 208 42.6
  Africa 528 33.8 362 33.7 166 34.0
  North-America 585 37.5 410 38.2 175 35.9
  Central/South-America 417 26.7 306 28.5 111 22.8
C. Consumption of meat g
 No, never 5 0.3 5 0.5 0 0
 No, only in the past 24 1.6 20 1.9 4 0.8
 Yes 1518 98.1 1036 97.6 482 99.2
  1. a8 missing values
  2. b12 missing values
  3. c14 missing values
  4. d60 missing values
  5. e45 missing values
  6. fshown if reported by > = 50 participants
  7. g15 missing values