| Summary: | Abstract Patient‐reported quality‐of‐life (QoL) and carer impacts are not reported after leucine‐rich glioma‐inactivated 1‐antibody encephalitis (LGI1‐Ab‐E). From 60 patients, 85% (51 out of 60) showed one abnormal score across QoL assessments and 11 multimodal validated questionnaires. Compared to the premorbid state, QoL significantly deteriorated (p < 0.001) and, at a median of 41 months, fatigue was its most important predictor (p = 0.025). In total, 51% (26 out of 51) of carers reported significant burden. An abbreviated five‐item battery explained most variance in QoL. Wide‐ranging impacts post‐LGI1‐Ab‐E include decreased QoL and high caregiver strain. We identify a rapid method to capture QoL in routine clinic or clinical trial settings.
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