Objective
Investigate the relationship of excess and central adiposity with pediatric psoriasis severity.
Design, Setting and Participants
Multi-center, cross-sectional study of 409 psoriatic children. Psoriasis was classified as mild (worst Physician’s Global Assessment (PGA) <3 with body surface area (BSA) <10%) or severe (worst PGA >3 with BSA >10%). Children were enrolled from 9 countries July 2009-December 2011.
Main Outcome Measures
Excess adiposity (body mass index (BMI) percentile) and central adiposity (waist circumference (WC) percentile and waist-to-height ratio).
Results
Excess adiposity (BMI >85th percentile) occurred in 37.8% (n=155) of psoriatics vs. 20.5% (n=42) of controls, but did not differ by severity. The odds of obesity (BMI >95th percentile) overall in psoriatics vs. controls were OR=4.29, 95% CI=1.96-9.39, but were higher with severe (OR=4.92, CI=2.20-10.99) than mild (OR=3.60, CI=1.56-8.30) psoriasis, particularly in the U.S. (OR=7.60, CI=2.47-23.34, and OR=4.72, CI=1.43-15.56, respectively). WC >90th percentile occurred in 9.3% (n=19) of controls, 14.0% (n=27) of mild, and 21.2% (n=43) of severe psoriatics internationally, and especially in the U.S. (12.0% of controls, 20.8% of mild, and 31.1% of severe psoriatics). Waist-to-height ratio was significantly higher in psoriatic (0.48) vs. control (0.46) children, but unaffected by psoriasis severity. Children with severe psoriasis at their worst, but mild at enrollment, showed no difference in excess or central adiposity from children who remained severe at enrollment.
Conclusion
Globally, children with psoriasis have both excess adiposity and increased central adiposity, regardless of severity. The increased metabolic risks associated with excess and central adiposity warrant early monitoring and lifestyle modification.