Acquisition of autonomy skills in adolescents with myelomeningocele

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Abstract
This study describes ages of acquisition (AOA) of typical adolescent autonomy skills in a regional cohort of individuals with myelomeningocele (MM), aged 12 to 18 years, with a mean age of 14 years 11 months (SD 2y 5mo). Prospectively collected data over 10 years were analyzed. Regression analysis, using Generalized Estimation Equation, provided 50th centile and 75th centile AOA for each skill. One hundred and fifty-eight participants (90 males, 68 females) attended 378 annual patient visits. Patient contacts were equally distributed across age and physical severity groupings. Twenty-four percent of participants had functional lesion levels at or above L2, and 38% between L3-L5, 38% at S1 or below. Eighty-four percent had shunted hydrocephalus, 24% were independent in ambulation, and 69% achieved toileting independence before adolescence. AOA for autonomy skills were delayed by 25 to 30% when compared with typically developing adolescents. Differences in cognitive ability explained the variance in median ages for skill acquisition (p=0.01) more than physical lesion level. Participants acquired community skills at a median age of 16 years 6 months. Twelve percent of 18-year-olds drove cars (9% with supervision, 3% independently), regardless of physical lesion severity. We conclude that adolescents with MM acquire the majority of autonomy skills 2 to 5 years later than their typically developing peers. This study establishes AOA timelines for autonomy skills in adolescents with MM.

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