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Open Access Research article

A forgotten aspect of the NICE reference case: an observational study of the health related quality of life impact on caregivers of people with multiple sclerosis

Sarah Acaster1*, Rodolphe Perard2, Deven Chauhan2 and Andrew J Lloyd1

Author Affiliations

1 Oxford Outcomes Ltd, Seacourt Tower, West Way, Oxford, UK

2 Merck Serono Ltd, Bedfont Cross, Stanwell Road, Feltham, Middlesex, UK

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BMC Health Services Research 2013, 13:346  doi:10.1186/1472-6963-13-346

Published: 9 September 2013

Abstract

Background

There are few published health technology assessments that have included the impact of a disease or treatment on caregivers’ health related quality of life (HRQL). The objectives of this study were to explore the overall HRQL of caregivers of people with Multiple Sclerosis compared to matched controls, and more specifically explore the impact of different levels of functioning in people with MS on caregivers’ HRQL scores.

Methods

A cross sectional observational study conducted as an online survey was undertaken in the UK. 200 caregivers of people with MS and 200 matched controls completed the EQ-5D, SF-36, HADS and a socio-demographic questionnaire. Caregivers also completed the Patient Determined Disease Steps questionnaire as a measure of MS severity. Differences in HRQL between caregivers and controls were assessed using t-tests and chi square analyses as appropriate. Ordinary Least Squares regression was also used to evaluate the disutility of being a caregiver compared to controls stratified by MS severity.

Results

Caregivers reported significantly lower HRQL, as measured by the SF-36, HADS and EQ-5D, compared to matched controls. A lower level of functioning in people with MS was mirrored by lower levels of caregivers’ HRQL. At the point at which mobility problems required wheelchair use caregivers reported better HRQL.

Conclusions

The potential impact of caregiving on HRQL is an important consideration for economic evaluations. In relation to MS, the results suggest that caregiver’s HRQL deteriorates as the people with MS lose functioning; thus treatments that delay loss of function may have a benefit for caregivers as well as patients.

Keywords:
Health related quality of life; Burden of illness; Multiple sclerosis; Disease severity; Indirect costs