“…As caregiving time increased, long-term caregivers felt more burdened by caregiving than by the benefit from it. 30 A longitudinal study of patients with multiple sclerosis found that the level of BF was positively correlated with diagnosis time 45 ; that is, the longer the diagnosis time, the higher the BF level. Cassidy found that caregiver benefit perception has two peaks: one at 7–12 months and the other at 13–24 months.…”