In this study the feeding patterns and practices at the introduction of a second stage phe-free protein substitute will be assessed in young children with PKU. This will be compared with the normal weaning process in healthy non-PKU age-matched children. In addition, tolerability and acceptability of the study product will be evaluated in a smaller group of subjects who have already been transferred onto a second stage protein substitute. The study is performed in 3 centers in the United Kingdom.
Part 1: For subjects with PKU, the study product will be incorporated in the diet as the second stage protein substitute until the subjects are 2 years of age. The healthy non-PKU age-matched subjects will not have the study product incorporated in their diet in order to be able to compare the weaning experience and nutritional intake of PKU subjects with non-PKU subjects. The healthy subjects will also be part of the study until the subjects are 2 years of age. Part 2: All PKU subjects will take the study product for 7 days.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
46
The study product is a powdered phe-free protein substitute supplemented with long chain polyunsaturated fatty acids (LCP's), containing essential and non-essential amino acids, carbohydrate, fat, vitamins, minerals and trace elements and has been designed for use in the management of proven PKU in children aged 6 months to 5 years.
Birmingham Children's Hospital
Birmingham, United Kingdom
Bradford Teaching Hospitals NHS Foundation Trust, St Luke's Hospital
Bradford, United Kingdom
JB Russell House, Gartnavel Royal Hospital
Glasgow, United Kingdom
Feeding patterns- product intake
Actual intake of product and prescribed amount of product \[# sachets\] will be recorded as documented in diaries.
Time frame: up to 2 years
Feeding patterns - intake other than study product
Intakes of standard formulas / breast-milk and normal foods \[mL\] or \[g/day\] and \[frequency\] of breastfeeding, as documented in diaries.
Time frame: up to 2 years
Feeding practices and difficulties by questionnaire; position
Feeding practices entered by parents in diaries: the way the child has been fed will be assessed : categories \[sitting position e.g on lap, in chair etc\]
Time frame: up to 2 years
Feeding practices and difficulties by questionnaire; self feeding
Feeding practices entered by parents in diaries; the way the child has been fed will be assessed : \[self-feeding; parent feeding\]; \[type of self feeding: bottle, finger; spoon, fork\]
Time frame: up to 2 years
Occurence of Adverse Events [ Safety and tolerability]
Occurence of Adverse Events
Time frame: up to 2 years
Gastro-Intestinal symptoms
Occurence of GI symptoms \[yes/no\] for: * Mouth Ulcers * Tummy upset * Harder poos * Constipation * Softer poos * Vomiting * Colic * Other (free entry)
Time frame: up to 2 years
Product Acceptability yes/no
Acceptability questions \[yes/no\] for: * Refuses more than takes * Refuses as much as takes * Takes more than refuses * Spits out product * Puts spoon away * Holds in mouth but won't swallow * Closes mouth on feeding * Cries at beginning of feed * Cries at end of feed * Deliberately spills feed * Turns head away * Other (free entry)
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Time frame: up to 2 years
Blood Phenylalanine control: Phe levels
Phe levels \[umol/L\]
Time frame: up to 2 years
Blood Tyrosine levels
Tyrosine levels \[umol/L\]
Time frame: up to 2 years
Intake of energy and nutritients: Study product
Intakes of energy and nutrients from the study product \[diet diary; #g product/day\]
Time frame: up to 2 years
Intake of energy and nutritients: Weaning
Intakes of energy and nutrients from the weaning diet: descriptive information, intakes \[g/day\]
Time frame: up to 2 years
Intake of energy and nutritients: Weaning
Intakes of energy and nutrients from the weaning diet: descriptive information, intakes \[# meals or snacks/day\]
Time frame: up to 2 years
Anthropometry: weight
Weight \[g\]
Time frame: up to 2 years
Anthropometry: length
Length \[cm\]
Time frame: up to 2 years
Weaning per group (with our without protein substitute) - descriptive
Compare the weaning , nutritional intakes \[g/day\] and metabolic control of infants taking the study product, with historical controls of the same age and weaning stage whose diet did not incorporate a semi-solid second stage protein substitute during the same time period \[parent questionnaires\]
Time frame: up to 2 years
Anxiety levels of parents - Beck's Anxiety inventory
The Beck's Anxiety Inventory, scores on domains \[0 not at all - 3 severely\]
Time frame: up to 2 years
Coping mechanisms of parents by questionnaire
Coping Health Inventory for Parents (scores on domains coping behaviour \[3 extremely helpful -0 not helpful\]
Time frame: up to 2 years
Parent experience of Feeding via questionnaire
Feeding time Parent Questionnaire, experience of parents of their child's feeding time, scores on various domains \[0-7\]
Time frame: up to 2 years