Fig. 3.

Dose of total protein (g/kg/day) prescribed to patients with classical PKU by each centre per patient age group. Box and whisker plot, with boxes representing interquartile range (thick line indicating the median, with value indicated in the plot), dashed whiskers minimum and maximum values. ‘n’ represents the number of questionnaires which provided an answer for each group; age groups were as follows: newborns and infants, <1 year of age; young children, 1–4 years of age; older children, 5–10 years of age; adolescents, 11–17 years of age; adults, ≥18 years of age