Neuroimaging assessment of facility-bound severely-affected MS reveals the critical role of cortical gray matter pathology: results from the CASA-MS case-controlled study.

BACKGROUND: A subgroup of people with multiple sclerosis (pwMS) will develop severe disability. The pathophysiology underlying severe MS is unknown. The comprehensive assessment of severely affected MS (CASA-MS) was a case-controlled study that compared severely disabled in skilled nursing (SD/SN) (EDSS ≥ 7.0) to less-disabled (EDSS 3.0-6.5) community dwelling (CD) progressive pwMS, matched on age-, sex- and disease-duration (DDM). OBJECTIVES: To identify neuroimaging and molecular biomarker characteristics that distinguish SD/SN from DDM-CD progressive pwMS. METHODS: This study was carried at SN facility and at a tertiary MS center. The study collected clinical, molecular (serum neurofilament light chain, sNfL and glial acidic fibrillary protein, sGFAP) and MRI quantitative lesion-, brain volume-, and tissue integrity-derived measures. Statistical analyses were controlled for multiple comparisons. RESULTS: 42 SD/SN and 42 DDM-CD were enrolled. SD/SN pwMS showed significantly lower cortical volume (CV) (p < 0.001, d = 1.375) and thalamic volume (p < 0.001, d = 0.972) compared to DDM-CD pwMS. In a logistic stepwise regression model, the SD/SN pwMS were best differentiated from the DDM-CD pwMS by lower CV (p < 0.001) as the only significant predictor, with the accuracy of 82.3%. No significant differences between the two groups were observed for medulla oblongata volume, a proxy for spinal cord atrophy and white matter lesion burden, while there was a statistical trend for numerically higher sGFAP in SD/SN pwMS. CONCLUSIONS: The CASA-MS study showed significantly more gray matter atrophy in severe compared to less-severe progressive MS.

The Contribution of Social Support, Professional Support, and Financial Hardship to Family Caregiver Life Satisfaction After Traumatic Brain Injury.

OBJECTIVES: (a) To assess whether 3 changeable environmental variables (social support, professional support, and financial hardship) contribute to explaining differences in well-being of family caregivers after traumatic brain injury (TBI), above and beyond the influence of neurobehavioral functioning. (b) To assess the unique and relative contribution of social support, professional support, and financial hardship to life satisfaction of family caregivers. PARTICIPANTS: Adult family caregivers (n = 136) of individuals who received inpatient rehabilitation following a TBI. MEASURES: The Social Provisions Scale; Brief Scale of Financial Hardship after Brain Injury; Satisfaction with Life Scale; and adapted scales measuring professional support and neurobehavioral functioning. DESIGN: Cross-sectional study using survey methodology. RESULTS: Social support, professional support, and financial hardship explained a significant amount of variance in life satisfaction after controlling for neurobehavioral functioning (R change = 0.34, considered a large effect size). Social support and financial hardship were significant unique predictors within the model, but professional support was not. CONCLUSION: Social support and financial hardship are prominent environmental variables that may hold promise for targeted intervention development and testing designed to support family adaptation after TBI.