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Table 4 The effect of risk factors on reinfection lice after eradication*.

From: Eradication of Lice in Cattle

Risk factor

Number of herds (n = 28)

Result 15–18 months after the eradication

Relative risk

p-value Fisher's exact test One tailed

  

Free

Lice Present

  

Purchase of livestock or use of common pasture

20

12

8

1.41 (0.93 – 2.13)

0.17

Identified failure in precautions for livestock

9

2

7

5.25 (1.44 – 19.11)

0.005

Identified failure in precautions for persons

28

19

9

-

-

  1. *The analysis was based on herds which succeeded with the eradication from both the pilot group and the main group.