SMA patient, caregiver well-being closely linked, study finds
Researchers say association particularly strong for patients who can sit
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- SMA crimps physical mobility, daily activities, and overall health-related quality of life for patients.
- Patient and caregiver well-being are linked, with caregivers facing substantial physical strain, financial burdens, and mental health challenges.
- Clinical care should adopt a family-centered approach that accounts for the patient's functional status and incorporates caregiver perspectives.
Health-related quality of life for spinal muscular atrophy (SMA) patients treated with Spinraza (nusinersen) is closely linked to the well-being of their caregivers, particularly among patients who are able to sit, a South Korean study found.
Participants with SMA who had poorer motor function generally reported lower quality of life. Caregivers experienced challenges of their own, especially in areas such as daily activities, physical strain, and finances.
The findings support “the value of incorporating caregiver perspectives into clinical care and health policy planning,” the researchers wrote.
The study, “Health-related quality of life in patients with spinal muscular atrophy receiving nusinersen and their caregivers: a cross-sectional study,” was published in Scientific Reports.
Real-world effects of disease, treatment
SMA is a neuromuscular disorder in which the loss of motor neurons, the nerve cells that control movement, causes progressive muscle weakness and difficulties with movement and daily activities.
Although disease-modifying treatments such as Biogen‘s Spinraza have improved survival and motor function, people with SMA and their caregivers continue to face significant medical and psychosocial difficulties. As these patients live longer, tracking their functional abilities may provide useful insights into their health-related quality of life.
Caregiving can also bring substantial physical, emotional, and financial demands, particularly when patients require help with ongoing needs like daily activities or respiratory support. However, there’s a lack of real-world data on how patients’ and caregivers’ quality of life is linked.
To learn more, researchers in South Korea used validated questionnaires to assess health-related quality of life in 36 SMA patients receiving Spinraza (mean age 22.1, 55.6% girls or women) and 32 primary caregivers. Four participants had SMA type 1, and 32 had SMA type 2.
Eleven patients were classified as nonsitters, while 25 were able to sit. One patient who could sit was also able to walk.
The EQ-5D-5L questionnaire covers areas such as mobility, self-care, usual activities, pain, discomfort, and anxiety/depression. The PedsQL-NMM, which stands for Pediatric Quality of Life Inventory Neuromuscular Module, measures health-related quality of life in children with neuromuscular diseases, including neuromuscular symptoms, communication, and family resources.
Overall, participants with SMA reported substantially impaired quality of life, with an EQ-5D-5L score of 0.3, where 1 represents the best possible quality of life. They also had a mean PedsQL-NMM score of 57.7, where 100 represents the best possible score.
Quality of life was lower among nonsitters than sitters and among participants with SMA type 1 than in those with SMA type 2. All patients reported problems with mobility and self-care, and 97.2% had problems with usual activities.
Those unable to sit were more likely to report problems across all EQ-5D-5L domains, particularly pain or discomfort (90.9% vs. 72%) and anxiety or depression (81.8% vs. 68%).
Caregivers reported good overall health-related quality of life, with a mean EQ-5D-5L score of 0.86. Scores were higher among caregivers of sitters than among those of nonsitters, and for participants dealing with SMA type 2 relative to caregivers of SMA type 1 patients.
Other measures from the CarerQol-7D, an instrument that assesses health-related quality of life among informal caregivers, revealed substantial challenges, particularly in usual activities (78.1%), physical health (68.7%), and finances (59.4%).
Additional analysis demonstrated that participants with SMA who reported better quality of life generally had caregivers who also reported better quality of life. These associations were particularly evident among sitters. Patient-perceived family resource levels correlated significantly with the mental and physical health of caregivers, as well as with their anxiety/depression and pain/discomfort.
Better patient self-care scores were also significantly associated with less anxiety/depression in caregivers.
“These results highlight the importance of a family-centered perspective in SMA care,” the researchers said. “Rather than relying solely on SMA type, interventions should consider the patient’s functional status.”
The authors noted that their study had limitations, including that the analysis was conducted at a single point in time, so quality of life or treatment effects could not be assessed.
“These findings should be interpreted within the context of a relatively small Korean cohort and warrant confirmation in larger, multi-centre studies,” the team wrote.
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