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Results from cross-sectional studies suggest that insomnia is common in adolescents. Here, researchers used interviews and questionnaires to prospectively assess insomnia symptoms in 4175 adolescents (age range, 11–17) at baseline and 1 year later, and examined possible insomnia risk factors, including demographics, perceived physical and mental problems, and life stressors.
Analysis was restricted to the 3134 respondents (75%) who completed the follow-up. At baseline, 14% reported at least one symptom (initial insomnia, middle insomnia, frequent awakenings, early morning awakening, or nonrestorative sleep) almost every day in the preceding 4 weeks; 46% of these respondents also reported symptoms at 1-year follow-up. At least one insomnia sy…