Safety and Efficacy of Mutation-targeted Precision Genetic Therapy for Ataxia-Telangiectasia (A-T)

Neurological function as measured by the AT-NEST scale

The Ataxia-Telangiectasia Neurological Examination Toolkit (AT-NEST) is a test designed specifically for people with Ataxia-Telangiectasia (A-T). It helps doctors and researchers understand how the brain and nerves are working. The test looks at six main areas: * Communication * Eye movements Ataxia (problems with balance and coordination) * Movement disorders * Muscle strength (Power) * Nerve function (Neuropathy) These six areas make up the "pure neuro" score, which ranges from 0 (lowest) to 100 (highest). The test also includes growth and nutrition. When these are added to the six main areas, a total "neuro-related" score is calculated, with a maximum of 114. Higher scores mean better overall performance.This test is not painful and is carried out by trained specialists who will guide you through each step.

Ataxia-Telangiectasia Structured Clinical Global Impression of Change (A-T CGI)

The Ataxia-Telangiectasia Clinical Global Impression of Change (AT-CGI) is a tool used to track how A-T progresses over time. It looks at five main areas of the disease: Ataxia (balance and coordination problems) Dysarthria (difficulty speaking) Repetitive movements / Dysmetria (trouble controlling movements) Movement disorders Eye movements Each area is scored from 0 to 4, for a total of 20 points. Higher scores mean more severe symptoms, while lower scores indicate better function.

Motor performance as measured by the Bruininks-Oseretsky Test of Motor Proficiency 2nd edition

The Bruininks-Oseretsky Test of Motor Proficiency 2nd edition (BOT-2) is a simple way for therapists to check how your child is developing movement skills. It looks at: * Small hand and finger movements (fine motor) * How quickly and accurately hands are used (dexterity) * Big movements like running or jumping (gross motor) * How well the body works together (coordination) During the test, the child does different activities, and each one is scored. These scores are added up to give both an overall score (out of 200 points) and separate scores for each skill area. The results are then compared to what is typical for children of the same age.

Performance and goal satisfaction as measured by the Canadian Occupational Performance Measure (COPM)

The Canadian Occupational Performance Measure (COPM) is a test done by an occupational therapist to understand what daily activities are most important to a person and how well they feel they can do them. During the test, the person picks up to five activities they find difficult or want to improve. For each activity, they rate: * How well they can do it * How satisfied they are with their performance Both scores range from 1 to 10 (higher numbers mean better performance or more satisfaction). The scores are then averaged to see overall progress. The main goal is to track improvements over time, especially before and after a therapy or intervention.

Performance in activities of daily living as measured by the Pediatric Evaluation of Disability Inventory Computer Adaptive Test

The Pediatric Evaluation of Disability Inventory - Computer Adaptive Test (PEDI-CAT) is a questionnaire filled out by parents or caregivers. It helps us understand how a child is doing in everyday life. It looks at four areas: * Daily activities (like eating, dressing, and personal care) * Mobility (how a child moves around) * Social/cognitive (how a child plays, communicates, and learns) * Responsibility (how much a child can manage tasks at home or in the community) The test is "adaptive," meaning the questions change depending on how you answer, so it fits your child's abilities. Each area gets a score from 0 to 100, with higher scores meaning better functional ability.

Visual-motor function as measured by the Beery-Buktenica Developmental Test of Visual Motor Integration

The Beery-Buktenica Developmental Test of Visual-Motor Integration (Beery-VMI) is a test often given by occupational therapists to see how well a child's eyes and hands work together. During the test, the child copies shapes and designs that get harder as the test goes on. Sometimes the child may also be asked to find differences between pictures or match patterns. The results show: * A standard score with a range of 45 to 155; higher scores indicate a better performance * A percentile score, which shows what percentage of children the same age scored lower. This helps parents and therapists see how the child's coordination and fine motor skills are compared to others their age.