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To design and validate a hearing-related quality-of-life questionnaire targeted toward parents and deaf or hard-of-hearing infants and toddlers the Hearing-Related Infant/Toddler and Parent Quality of Life (HIP-QL) questionnaire. Cross-sectional questionnaire and prospective instrument validation. Academic pediatric otolaryngology clinic. A 67-question questionnaire developed from constructs of a grounded theory analysis was administered to parents of 31 deaf or hard-of-hearing children and 14 typically hearing children. Que