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Table 4 Difference in the number of days from infection to confirmed positive test result between the two antigen tests (PetChek® versus DiroCHEK®) within dogs infected with the Big Head™ heartworm isolate

From: Evaluation of Dirofilaria immitis antigen detection comparing heated and unheated serum in dogs with experimental heartworm infections

Serum Tested

Difference in # Days from Infection to Positive Resulta

PetChek® – DiroCHEK®

p-value

N

Mean (days)

SDb

Min

Max

95% CIc

L d

U d

Heated

5

14.0

13.1

0

28

˗2.3

20.3

0.0751

Unheated

5

1.6

3.6

0

8

˗2.8

6.0

0.3739

  1. aBig Head™ isolate data only were used for this analysis
  2. b SD standard deviation
  3. c95%CI = 95% Confidence Interval around the mean difference
  4. d L lower bound of 95% confidence interval, U upper bound of 95% confidence interval