Japanese version of the Zarit burden interview, short version (J‐ZBI_8)		Mean (SD)
1	Do you feel embarrassed over your relative's behaviour?	2.42 (1.22)
2	Do you feel angry when you are around your relative?	1.55 (1.11)
3	Do you feel that your relative currently affects our relationships with other family members or friends in a negative way?	2.01 (1.29)
4	Do you feel strained when you are around your relative?	1.99 (1.32)
5	Do you feel that your social life has suffered because you are caring for your relative?	1.74 (1.33)
6	Do you feel uncomfortable about having friends over because of your relative?	1.92 (1.53)
7	Do you wish you could leave the care of your relative to someone else?	1.57 (1.28)
8	Do you feel uncertain about what to do about your relative?	2.24 (1.17)