Table 5 Geometric and arithmetic mean (standard deviation) flea counts 8 h post-treatment (Day 0) and post-reinfestations in Study 3

 Arithmetic mean

67.3 (6.7)

71.5 (9.2)

70.5 (13.4)

74.7 (11.3)

71.5 (6.1)

 Geometric mean

67.1^a

71.0^a

69.4^a

73.9^a

71.3^a

 Arithmetic mean

11.3 (8.8)

10.3 (7.6)

8.5 (9.3)

16.5 (8.2)

29.0 (10.9)

 Geometric mean

8.9^a,d

8.3^a

4.7^a

14.4^a

27.1^a

 % Reduction from Control

86.8

88.3

93.2

80.5

62.0

 Arithmetic mean

53.8 (18.8)

29.5 (16.0)

18.5 (10.9)

13.0 (6.3)

38.2 (11.8)

 Geometric mean

51.0^d

23.9^a,d

14.6^a,c

11.9^a

36.6^d

 % Reduction from Control

24.0

66.3

78.9

83.9

48.7

 Arithmetic mean

26.8 (18.1)

10.5 (7.3)

3.2 (2.8)

10.5 (6.2)

19.3 (15.7)

 Geometric mean

21.4^a,d

8.9^a,d

2.3^a,c

9.4^a

14.4^a,d

 % Reduction from Control

68.1

87.5

96.7

87.3

79.8