Body mass index and waist circumference in persons aging with muscular dystrophy, multiple sclerosis, post-polio syndrome, and spinal cord injury.
BACKGROUND
Body mass index (BMI) and waist circumference (WC) are well-understood in the general population, but are not adequately understood among persons with disabilities.


OBJECTIVE
To describe and compare BMI and WC among individuals with muscular dystrophy (MD), multiple sclerosis (MS), post-polio syndrome (PPS), and spinal cord injury (SCI). BMI scores were also compared to normative data of the U.S. population, with consideration for age, sex, and mobility limitations.


METHODS
Persons with MD (n = 339), MS (n = 597), PPS (n = 443), and SCI (n = 488) completed postal surveys that included self-reported BMI and WC data. NHANES data were used to compare the current sample with a representative US sample.


RESULTS
Participants with PPS had higher BMI than participants with MD, MS, and SCI. In addition, participants with MS had significantly higher BMI relative to participants with SCI. BMI was significantly positively associated with age, years since diagnosis, mobility, and interactions of some of these factors. Relative to the general population, BMI was lower in MD, MS, and SCI across age groups, as well as in men with PPS and women ages 60-74 years with PPS. No significant differences were identified between MD, MS, PPS, and SCI in WC.


CONCLUSIONS
The presence of group differences in BMI and absence of group differences in WC suggests that BMI may not accurately represent health risk in SCI, MD, and possibly MS, because of biasing elements of the conditions, such as changes in body composition and mobility limitations.
Department of Rehabilitation Medicine, University of Washington School of Medicine, Seattle, WA 98104, USA. kalschul@uw.edu
Kevin N
KN
Alschuler
Laura E
LE
Gibbons
Dori E
DE
Rosenberg
Dawn M
DM
Ehde
Aimee M
AM
Verrall
Alyssa M
AM
Bamer
Mark P
MP
Jensen
D000328:Adult; D000367:Age Factors; D000368:Aged; D015992:Body Mass Index; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D051346:Mobility Limitation; D009103:Multiple Sclerosis; D009136:Muscular Dystrophies; D016262:Postpoliomyelitis Syndrome; D012016:Reference Values; D057566:Self Report; D012737:Sex Factors; D013119:Spinal Cord Injuries; D014481:United States; D055105:Waist Circumference