Table 1 Number and characteristics of cats treated with the Seresto® collar (G1) and untreated controls (G2) that either completed or were excluded from the study

 Number of cats

79

80

159

 Number of households

41

39

80

 Age (months) Mean (Min - Max)

38.3 (6–180)

29.3 (7–144)

33.7 (6–180)

 Gender (%) Female/Male

53.2/46.8

55.0/45.0

54.1/45.9

 Weight (kg) Mean (Min - Max)

4.3 (1.9–7.8)

3.9 (2.1–7.0)

4.09 (1.9–7.8)

 Hair length (%) Short/Long

81.0/19.0

78.8/21.2

79.9/20.1

 Environment (%) Rural/Suburban/Urban

48.1/48.1/3.8

56.2/38.8/5.0

52.2/43.4/4.4

Excluded from the study

G1

G2

Total

 Number of cats

25

20

45

 Deceased^a

6

3

9

 Suspected adverse drug reaction

1

–

1

 Infected by L. infantum at the inclusion

8

10

18

 Lost to follow up

8

7

15

 Collar lost and not replaced promptly

2

–

2