Purpose 

Children with cardiomyopathy are at risk of heart failure with reduced physical activity (PA) as a cardinal manifestation. Clinical assessment of PA in children is challenging due to the limited validity of subjective reports. The aim of the study was to compare accelerometery measurement with parental report and to identify factors associated with movement behavior (PA, sedentary time, steps per day).

Method 

Fifteen patients with cardiomyopathy (mean, 9.7 years; 64% male) were asked to wear an Actigraph GT3X accelerometer in Edmonton, Canada. Demographics, clinical characteristics, parental-reported PA, and health-related quality of life data were also collected.

Results 

Participants engaged in a median of 38 minutes of moderate-vigorous PA per day with higher levels in boys versus girls (73.9 [25.03, 78.91] vs 4.13 [2.53, 37.67] minutes, P = .03). Children participating in recreational sports showed a higher level of moderate-vigorous PA (73.92 min/d) compared with those who did not participate (73.9 vs 22.7 min/d, P = .05), and positive family outlook on the child's health was associated with less sedentary time (P = .04).

Conclusion 

Accelerometer measurement in children with cardiomyopathy is an achievable and more objective measure of PA compared with parental report alone and highlighted low levels of PA among these children.

中文翻译：

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心肌病儿童的自我报告和加速度计测量的身体活动

目的 

患有心肌病的儿童有发生心力衰竭的风险，其主要表现是体力活动 (PA) 减少。由于主观报告的有效性有限，对儿童 PA 的临床评估具有挑战性。该研究的目的是将加速度计测量值与父母报告进行比较，并确定与运动行为（PA、久坐时间、每天步数）相关的因素。

方法 

在加拿大埃德蒙顿，15 名心肌病患者（平均 9.7 岁；64% 为男性）被要求佩戴 Actigraph GT3X 加速度计。还收集了人口统计学、临床特征、父母报告的 PA 和健康相关的生活质量数据。

结果 

参与者每天平均进行 38 分钟的中等强度 PA，男孩的水平高于女孩（73.9 [25.03, 78.91] 对 4.13 [2.53, 37.67] 分钟，P = .03）。与不参加休闲运动的儿童相比，参加休闲运动的儿童表现出更高水平的中等强度 PA（73.92 分钟/天）（73.9 对 22.7 分钟/天，P = .05），并且家庭对儿童健康的积极态度是与较少的久坐时间相关（P = .04）。

结论 

与单独的父母报告相比，对患有心肌病的儿童的加速度计测量是一种可实现且更客观的 PA 测量，并突出了这些儿童的 PA 水平较低。