BACKGROUND Parent-child diet quality resemblance is unknown in families of youth with type 1 diabetes, for whom nutrition is central to disease management. OBJECTIVE Examine diet quality resemblance in families of youth with type 1 diabetes participating in a behavioral nutrition intervention trial and investigate whether treatment assignment or family meal frequency modifies resemblance. DESIGN This is a secondary data analysis from an 18-month randomized controlled trial conducted August 2010 to May 2013. PARTICIPANTS/SETTING Parent-youth dyads (N=136, child age=12.3±2.5 years) were recruited from a northeast US diabetes center. MAIN OUTCOME MEASURES Parent and child Healthy Eating Index-2005 (HEI-2005, reflecting adherence to 2005 Dietary Guidelines for Americans) and whole plant food density (WPFD, reflecting intervention target foods) were calculated from 3-day food records collected every 6 months. STATISTICAL ANALYSIS Linear random effects models adjusting for demographics and disease characteristics investigated parent-child diet quality resemblance. Separate models examined whether treatment assignment or family meal frequency modified resemblance. Three-way interaction terms examined whether resemblance changed over time by treatment assignment. RESULTS Time-varying parent and child HEI-2005 and WPFD were positively associated (P<0.001), and there were no interactions with family meals. Parent-child HEI-2005 resemblance was similar across treatment groups; however, parent-child WPFD resemblance was stronger in the intervention (β±standard error [SE]=.30±.06) vs control families (β±SE=.12±.05). Parent-child HEI-2005 resemblance was similar over time by treatment assignment, whereas parent-child WPFD resemblance increased over time for families in the intervention group (three-way interaction term β±SE=.03±.01). CONCLUSIONS Parent and youth diet quality were positively correlated in families of youth with type 1 diabetes. Resemblance was stronger in the intervention group for target foods, but not for a general measure of diet quality. The lack of effect modification by family meal frequency suggests that family diet quality resemblance is not contingent on shared meals.

中文翻译：

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参与马萨诸塞州波士顿随机对照行为营养干预试验（2010-2013 年）的 1 型糖尿病青少年家庭饮食质量的相似性：二次数据分析


背景 在患有 1 型糖尿病的青少年家庭中，亲子饮食质量的相似性尚不清楚，对他们来说，营养是疾病管理的核心。目的 检查参与行为营养干预试验的 1 型糖尿病青少年家庭的饮食质量相似性，并调查治疗分配或家庭进餐频率是否会改变相似性。设计 这是对 2010 年 8 月至 2013 年 5 月进行的一项为期 18 个月的随机对照试验的二次数据分析。 参与者/环境 父母-青少年二人组（N = 136，儿童年龄 = 12.3±2.5 岁）是从美国东北部糖尿病中心招募的。主要指标 2005 年家长和儿童健康饮食指数（HEI-2005，反映对 2005 年美国人膳食指南的遵守情况）和全植物食物密度（WPFD，反映干预目标食品）根据每 6 个月收集的 3 天食物记录计算。统计分析根据人口统计和疾病特征调整的线性随机效应模型调查了亲子饮食质量的相似性。单独的模型检查了治疗分配或家庭进餐频率是否改变了相似性。三向交互项检查相似性是否随着治疗分配的时间而变化。结果随时间变化的亲子HEI-2005和WPFD呈正相关（P<0.001），且与家庭膳食不存在交互作用。各个治疗组的亲子 HEI-2005 相似性相似；然而，与对照家庭 (β±SE=.12±.05) 相比，干预组中亲子 WPFD 相似性更强 (β±标准误差 [SE]=.30±.06)。 根据治疗分配，亲子 HEI-2005 相似性随着时间的推移相似，而干预组家庭的亲子 WPFD 相似性随着时间的推移而增加（三向交互项 β±SE=.03±.01）。结论 在患有 1 型糖尿病的青少年家庭中，父母和青少年的饮食质量呈正相关。干预组中目标食物的相似性更强，但饮食质量的一般衡量标准则不然。家庭进餐频率缺乏影响表明，家庭饮食质量的相似性并不取决于共同进餐。