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Table 1 Adjusted prevalence of Borrelia IgG seropositivity and 95% confidence intervals by sex, age and region

From: The value of seroprevalence data as surveillance tool for Lyme borreliosis in the general population: the experience of Belgium

Characteristic Number positivea samples/total number Adjusted prevalence % 95% CI P value
Sex
 Male 24/1608 1.34 0.81–2.20  
 Female 13/1607 0.78 0.32–1.90 0.29
Age (in years)
 < 15 12/1271 1.16 0.62–2.16  
 15–59 18/1590 0.91 0.50–1.63 0.94
 ≥ 60 7/354 1.38 0.48–3.89 0.58
Region
 Brussels 4/378 1.21 0.36–4.02  
 Flanders 27/2052 1.12 0.68–1.82 0.91
 Wallonia 6/785 0.93 0.31–2.74 0.75
Province
 West Flanders 2/522 0.44 0.00–2.33  
 East Flanders 2/431 1.23 0.31–4.77 0.34
 Flemish Brabant 8/532 1.06 0.39–2.84 0.37
 Antwerp 7/551 0.79 0.34–1.86 0.54
 Limburg 12/394 2.65 1.25–5.53 0.03b
 Hainaut 0/298 0 0.00–0.01 0.37
 Walloon Brabant 2/69 1.12 0.27–4.46 0.39
 Liège 3/175 2.82 0.78–9.72 0.05
 Namur 0/62 0 0.00–0.05 0.64
 Luxembourg 1/181 0.53 0.00–3.67 0.89
  1. aBoth the 30 positive and 7 equivocal IB results were considered as positive samples. bStatistically significant
  2. Differences in distribution of RLU values by age, gender and province were not statistically significant neither (results not shown)