［ロンドン ３日 ロイター］ テレビを１日に２時間以上見る子どもは、ぜんそくになるリスクが倍増することが３日、英国の研究で明らかになった。
OBJECTIVES: To investigate whether duration of television (TV) viewing in young children is associated with subsequent development of asthma.
DESIGN: Prospective longitudinal cohort study. SETTING: Avon Longitudinal Study of Parents and Children (ALSPAC), United Kingdom. PARTICIPANTS: Children taking part in Avon Longitudinal Study of Parents and Children (ALSPAC) with no wheeze up to 3 (1/2) years with follow up data at 11 (1/2) years.
MAIN OUTCOME MEASURES: Asthma defined as: Doctor diagnosed asthma by 7 (1/2) years with symptoms and/or treatment in last 12 months at 11 (1/2) years. Parental report of hours of children's television viewing per day was ascertained at 39 months. RESULTS: In children asymptomatic for wheeze to 3(1/2) years with follow up data at 11(1/2) years, asthma prevalence was 6% (185/3065). Increased TV viewing at 3 (1/2) years was associated with increased prevalence of asthma at 11 (1/2) years (p for linear trend=0.0003).
Children who watched television for more than 2 hours per day were almost twice as likely to develop asthma by 11 (1/2) years than those watching <2 hours TV per day (Adjusted Odds Ratio (AOR) (95% Confidence Interval) 1.8 (1.2 to 2.6)). CONCLUSION: Longer duration of TV viewing in children asymptomatic for wheeze at 3(1/2) years was associated with the development of asthma in later childhood.(from PubMed)