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Table 3 Univariate analyses of risk factors related to Babesia microti infection

From: High prevalence of Babesia microti in small mammals in Beijing

Variable

Sample size

Babesia microti infection

Cases

Constituent ratio (%)

Positive rate (%)

χ2

P-value

Year

2014

446

32.1

10.8

1.78

0.410

2017

419

30.1

11.7

  

2018

526

37.8

13.5

Altitude (m)

 ≤ 40

305

21.9

5.9

16.47

 < 0.001

40–400

903

64.9

14.5

 > 400

183

13.2

10.4

Gender

Female

514

39.4

9.9

4.77

0.029

Male

790

60.6

14.2

Age

Adult

1149

82.6

13.3

8.88

0.003

Pubertal

242

17.4

6.2

Ecological habitat

Residential

822

59.1

7.2

73.34

0.000

Shrub

135

9.7

27.4

Mixed forest

143

10.3

8.40

Broad-leaved forest

191

13.7

23.00

Cropland

100

7.2

16.00

  1. This table shows that significant differences were related to different altitudes, genders, ages, and types of ecological habitat of the small mammals, but not to different sampling years, based on the univariate analyses using Chi-square test
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Infectious Diseases of Poverty

ISSN: 2049-9957

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