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

 No. of cats

78

74

152

 Median age in months (interquartile range)

24 (10–48)

18 (10–36)

18 (10–36)

 Sex n (%) female/male

39/39 (50)

42 (56.8)/32 (43.2)

81 (52.29)/71 (46.71)

 Number of cats

26

26

52

 Infected with B. henselae at the inclusion

2

5

7

 Infected with B. clarridgeiae at the inclusion

5

1

6

Deceased^a

6

9

15

 Suspected adverse drug reaction

1

–

1

 Lost to follow up

12

11

23