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Table 3 Association of symptoms and potential risk factors with tick bites and seroconversion

From: Evaluation of factors influencing tick bites and tick-borne infections: a longitudinal study

  No tick bite (no. = 322)/tick bite (no. = 22)a, P-value Total
Symptoms ≤ 3 month
 Fever 4/0, P = 1 4/344 = 1.2%
 Headache 59/3, P = 0.777 62/344 = 18%
 Myalgia 19/2, P = 0.634 21/344 = 6.1%
 Arthralgia 18/1, P = 1 19/344 = 5.5%
 Lymphadenitis 10/1, P = 0.522 11/344 = 3.2%
 Fatigue 1/0, P = 1 1/344 = 0.3%
 Wound, unknown cause or after insect bite 21/5, P = 0.04 26/344 = 7.6%
 Wound, black crust 4/1, P = 0.411 5/344 = 1.5%
 Red ring on the skin 7/1, P = 0.520 8/344 = 2.3%
 Rash 7/1, P = 0.520 8/344 = 2.3%
Potential risk factors
 Outdoor recreational activities 228/18, P = 0.335 246/344 = 71.5%
 Outdoor work related activities 76/9, P = 0.077 85/344 = 24.7%
 Furred pet ownership 152/14, P = 0.136 166/344 = 48.3%
  No seroconversion (no. = 119)/seroconversion (no. = 8), P-value  
Symptoms since last blood sample
 Fever 1/0, P = 1 1/127 = 0.8%
 Headache 8/0, P = 1 8/127 = 6.3%
 Myalgia 3/0, P = 1 3/127 = 2.4%
 Arthralgia 5/0, P = 1 5/127 = 3.9%
 Lymphadenitis 0/0 0/127
 Fatigue 6/0, P = 1 6/127 = 4.7%
 Wound, unknown cause or after insect bite 3/0, P = 1 3/127 = 2.4%
 Wound, black crust 0/0 0/127
 Red ring on the skin 0/0 0/127
 Rash 0/0 0/127
Potential risk factors
 Outdoor recreational activities 81/4, P = 0.267 85/127 = 66.9%
 Outdoor work related activities 30/1, P = 0.678 31/127 = 24.4%
 Furred pet ownership 59/3, P = 0.717 62/127 = 48.8%
 Tick bite within season 7/0, P = 1 7/127 = 5.5%
  1. aTick bite in the period before the first sample collection and in the same season