Skip to main content

Table 1 Main results and rates of seropositivity.

From: Utilization of serology for the diagnosis of suspected Lyme borreliosis in Denmark: Survey of patients seen in general practice

Variable

Category

N

IgG positive

IgM positive

Treated

   

%

OR(95%CI)

%

OR(95%CI)

%

OR(95%CI)

 

Total

2643

3.4

 

10.4

 

21.1

1N = 2569

Age group

0-15 years

195

3.1

0.60(0.25-1.44)

21.0

2.29(1.52-3.47)

24.3

0.84(0.55-1.3)

 

16-50 years

1162

1.8

0.39(0.23-0.65)

9.0

1.01(0.76-1.34)

18.3

0.96(0.76-1.2)

 

>50 years

1286

4.8

reference

10.0

reference

23.2

reference

Sex

Female

1509

3.1

reference

10.1

reference

21.5

reference

 

Male

1134

3.7

1.23(0.79-1.91)

10.7

1.00(0.77-1.30)

20.6

0.90(0.72-1.1)

Reported tick bite

No bite

1468

3.3

reference

9.2

reference

12.0

reference

 

2"Insect bite"

346

2.0

0.42(0.18-0.97)

7.2

0.50(0.32-0.79)

26.8

1.36(0.98-1.9)

 

Tick bite

829

4.0

0.88(0.54-1.44)

13.6

1.05(0.79-1.47)

34.9

2.9(2.2-3.7)

3Exposure

Low

167

1.2

0.39(0.09-1.70)

6.0

0.81(0.40-1.63)

21.1

0.54(0.27-1.1)

 

Normal

2153

3.2

reference

10.7

reference

22.1

reference

 

High

323

5.6

1.59(0.89-2.83)

10.2

0.95(0.63-1.43)

7.9

0.90(0.64-1.3)

Suspected Lyme disease manifestation 4

Rash

1011

4.7

1.82(0.95-3.47)

17.2

3.30(2.22-4.89)

44.9

7.2(5.0-10)

Early neuroborreliosis

340

2.4

0.88(0.36-2.15)

6.2

0.95(0.55-1.63)

7.7

0.72(0.44-1.2)

Lymphocytoma

28

0

 

7.1

0.65(0.13-3.13)

17.9

1.80(0.62-5.3)

Carditis

14

0

 

21.4

3.66(0.93-14.35)

23.1

1.90(0.41-8.7)

Arthritis

603

2.3

0.79(0.37-1.66)

6.6

0.97(0.63-1.52)

8.4

0.63(0.42-0.94)

Acrodermatitis

67

10.4

3.20(1.24-8.25)

10.4

1.42(0.61-3.28)

13.6

0.93(0.42-2.1)

Chronic Neuroborreliosis

130

1.5

0.54(0.25-1.18)

5.4

0.87(0.45-1.69)

5.5

0.57(0.24-1.35)

Various

330

1.5

0.52(0.19-1.44)

6.7

0.91(0.53-1.56)

7.8

0.63(0.38-1.1)

No current clinical symptoms

367

3.8

1.22(0.61-2.46)

9.5

1.21(0.78-1.87)

8.3

0.38(0.24-0.60)

  1. Characteristics of 2,643 patients tested for Borrelia antibodies. The table includes the rates of seropositivity for IgG and IgM, the percent of patients treated with antibiotics, and the corresponding odds ratios for the three multivariate logistic regression models.
  2. Statistically significant odds ratios (OR) with 95% Confidence Intervals (CI) not including "one" are highlighted with bold
  3. 1Missing information about treatment from 74 patients.
  4. 2This option was called "other insect bite" on the questionnaire.
  5. 3Exposure was proposed as High if the patient was a farmer, forest worker and hunter or other patients with similar outdoor activities. Low exposure was proposed as a "person in rare contact with nature". All others were considered "normal".
  6. 4More than one symptom was registered for some patients. Categories for each symptom are "present" with "absent" as reference. The table has been shortened by omitting the% IgG positive,% IgM positive and% Treated for the patients when the respective symptom(s) are absent. These percentages were similar to the total average% positive/treated at the top of the table.
Back to article page

BMC Infectious Diseases

ISSN: 1471-2334

Contact us