Journal of human nutrition and dietetics : the official journal of the British Dietetic Association · 2013
Body mass index in adult patients with diet-treated phenylketonuria.
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Robertson L V, McStravick N, Ripley S, Weetch E, Donald S, Adam S, Micciche A, Boocock S, MacDonald A
Аннотация
BACKGROUND: There is an increasing number of adults with phenylketonuria (PKU) on a low phenylalanine diet. In the general population, an increasing body mass index (BMI) in the UK is a major problem with associated co-morbidities. The present study aimed to identify whether patients with diet-treated PKU have obesity rates comparable to those in the general population.
METHODS: Two hundred and thirty-six PKU subjects (49% male, 51% female), aged >16 years, who were diagnosed by newborn screening and were receiving a low phenylalanine diet, were identified from seven metabolic centres in the UK. Retrospective data were collated on age, sex, BMI and mean phenylalanine concentration over the previous 12 months.
RESULTS: Mean (SD) phenylalanine concentration for all 236 subjects was 789 (311) μm; mean (SD) BMI was 26 (5.4) kg m(-2) [males 25 (4.3) kg m(-2) , females 27 (6.2) kg m(-2) ]; mean (SD) age was 26 (7) years; and 55% had a BMI > 25 kg m(-2) . The percentage of subjects with a BMI >25 kg m(-2) and >30 kg m(-2) , as well as increasing obesity with age, was similar to the UK population. A correlation was observed between increasing BMI and a higher phenylalanine concentration (r = 0.243, P = 0.001).
CONCLUSIONS: The number of overweight and obese patients with diet-treated PKU in the UK is a concern. This could lead to other obesity-related complications increasing the complexity of diet and the cost of their care. There is a need to educate patients with respect to adopting a healthy, low phenylalanine diet and lifestyle to prevent further rises in BMI.
METHODS: Two hundred and thirty-six PKU subjects (49% male, 51% female), aged >16 years, who were diagnosed by newborn screening and were receiving a low phenylalanine diet, were identified from seven metabolic centres in the UK. Retrospective data were collated on age, sex, BMI and mean phenylalanine concentration over the previous 12 months.
RESULTS: Mean (SD) phenylalanine concentration for all 236 subjects was 789 (311) μm; mean (SD) BMI was 26 (5.4) kg m(-2) [males 25 (4.3) kg m(-2) , females 27 (6.2) kg m(-2) ]; mean (SD) age was 26 (7) years; and 55% had a BMI > 25 kg m(-2) . The percentage of subjects with a BMI >25 kg m(-2) and >30 kg m(-2) , as well as increasing obesity with age, was similar to the UK population. A correlation was observed between increasing BMI and a higher phenylalanine concentration (r = 0.243, P = 0.001).
CONCLUSIONS: The number of overweight and obese patients with diet-treated PKU in the UK is a concern. This could lead to other obesity-related complications increasing the complexity of diet and the cost of their care. There is a need to educate patients with respect to adopting a healthy, low phenylalanine diet and lifestyle to prevent further rises in BMI.