Table 3.

TBI-CareQOL Item Parameters for Feeling Trapped

Item	Slope	Threshold 1	Threshold 2	Threshold 3	Threshold 4
I feel like I cannot leave home because of the responsibilities I have as a caregiver.	4.83	−0.21	0.35	1.09	1.5
I cannot run errands because I need to be with the person I care for.	4.20	0.01	0.57	1.39	1.81
I find it difficult to do things alone because of the care I give to the person with the injury.	4.12	−0.26	0.31	1.1	1.62
My freedom feels limited when it comes to providing care for the person with the injury.	3.91	−0.37	0.2	1.11	1.52
I feel like I need to rush home to be with the person I care for.	3.64	−0.4	0.07	0.78	1.25
I feel limited about the places I can go because of the care I give to the person with the injury.	3.58	−0.31	0.2	0.97	1.41
I feel as if I am unable to go to public places because I need to take care of the person with the injury.	3.55	0.08	0.7	1.5	1.91
I feel like I cannot leave the person with the injury, even if other people are providing care.	3.49	0.12	0.61	1.25	1.64
I come home early from social gatherings because I need to be with the person I care for.	3.40	−0.37	0.22	0.89	1.39
I feel like I cannot have a minute away from the person I care for without worrying about him/her.	3.30	−0.2	0.37	1	1.49
I feel sad because I lost the freedom I once had before the person I care for was injured.	2.84	−0.2	0.47	1.29	1.7
I feel I have to be physically near the person I care for.	2.63	−0.47	0.07	1.02	1.79
I am unable to leave the person I care for alone.	2.50	0	0.54	1.19	1.55
It is difficult for me to trust that someone else can care for the person with the injury as well as I do.	2.37	−0.39	0.18	0.81	1.31
I feel restricted by the disability of the person I care for.	2.24	−0.45	0.27	1.33	1.94

Note. Items that are indicated in bold were selected for inclusion on the 6-item short form