Nebraska Study Tracks CF Nutrition
Most children with cystic fibrosis meet their calorie and macronutrient targets, but stark micronutrient gaps persist according to findings published in Cureus.
Researchers evaluated dietary intake among 33 pediatric patients and unaffected siblings at the Nebraska Regional CF Center between 2017 and 2021. The study found that 87 percent of participants with cystic fibrosis met their calorie goals, while 96 percent met protein requirements. Yet, dietary assessments revealed widespread deficits in fiber and specific fat-soluble vitamins.
Macronutrients Versus Deficiencies
Dietary logs showed that 20 of 23 pediatric patients with cystic fibrosis met their individualized calorie targets. Furthermore, 19 participants met their specific fat goals, and 22 reached protein targets. All 10 unaffected siblings in the cohort met calorie, fat, and protein goals.
Despite adequate macronutrient consumption, fiber intake fell below target levels in 57 percent of the cystic fibrosis group. Unaffected siblings experienced a similar shortfall, with 60 percent failing to reach recommended fiber intake.
Fat-Soluble Vitamin Shortfalls
According to Cureus, 100 percent of the participants with cystic fibrosis consumed less than the recommended target for vitamin K, and 96 percent fell short on vitamin E.
Vitamin A intake was below target in 48 percent of the pediatric patients. Meanwhile, vitamin D intake missed recommended thresholds in 26 percent of the cystic fibrosis group and 60 percent of their unaffected siblings.
Contrasting European Data
A separate retrospective study at the University Hospital of Bordeaux examined 130 patients aged two to 18 years between 2015 and 2020. That European cohort achieved recommended total energy intakes in only 53 percent of cases, with protein targets met by just 28 percent of patients.
While the Nebraska cohort showed high macronutrient compliance, both datasets showed persistent difficulties in maintaining optimal micronutrient levels. The Bordeaux findings indicated that vitamin and micronutrient levels remained normal in 80 percent of patients, though vitamin K stayed within the therapeutic range in only 42 percent of cases.
Clinical Growth Measures
Body mass index percentiles served as the primary growth evaluation tool for the Nebraska participants. The cystic fibrosis group recorded a median BMI at the 56th percentile, ranging from the 13th to the 97th percentile. Unaffected siblings displayed a median BMI at the 58th percentile.
Frequently Asked Questions
What caused the vitamin deficiencies in pediatric patients?
Exocrine pancreatic insufficiency affects approximately 90 percent of patients with cystic fibrosis, impairing digestive enzyme release and nutrient absorption.
How do cystic fibrosis dietary targets compare to standard guidelines?
Current recommendations advise that children with cystic fibrosis consume 1.2 to 2 times the recommended dietary allowance of calories.
What limits the interpretation of these findings?
Serum blood levels for fat-soluble vitamins were available for only a subset of 17 participants.
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