Table 1. Summary of administration errors.

	Wk 1 (n = 96)a	Wk 2 (n = 90)a	Wk 3 (n = 94)a	Wk 4 (n = 88)a	Wk 5 (n = 91)a	Wk 6 (n = 93)a	Wk 7 (n = 92)a	Wk 8 (n = 92)a
Use errors, n (%)
Any use error	1 (1)	1 (1)	2 (2)	1 (1)	1 (1)	3 (3)	4 (4)	1 (1)
Autoinjector not properly activated on injection site	1 (1)b	0	0	0	0	0	0	0
Autoinjector pulled away before end of injection	0	1 (1)	1 (1)b	0	1 (1)	1 (1)	1 (1)b	1 (1)
Medication observed at the injection site	0	0	1 (1)	1 (1)	0	2 (2)	3 (3)	0
Device error, n (%)
Any device error	0	0	0	0	1 (1)	1 (1)	2 (2)	0
Delivery stopped before end of injection	0	0	0	0	1 (1)b	0	0	0
Autoinjector did not activate	0	0	0	0	0	0	1 (1)b	0
Autoinjector leaked	0	0	0	0	0	1 (1)c	1 (1)c	0

^aNumber of injection attempts. In 5 cases, a patient had 2 attempts to administer their dose; ^bthe first attempt at injection was unsuccessful, the second attempt was successful; ^c1 patient reported unsuccessful injections at week 6 and 7, which were initially attributed to both use error and device error; further investigation determined that the injections were unsuccessful due to use error only.