AIM To determine the predictors of magnitude of change in response to a participation-focused leisure-time physical activity intervention in children with cerebral palsy (CP) using the ParticiPAte CP protocol. METHOD We included 33 children (16 males, 17 females) aged 8 to 12 years (mean age=10y, SD=1y 6mo) with CP with pre/postintervention data from a wait-list randomized trial. The hypothesized linear predictors of change in primary outcomes (Canadian Occupational Performance Measure [COPM]-performance and COPM-satisfaction, Belief in Goal Self-Competence Scale (BiGSS), and minutes per day moderate-to-vigorous physical activity [MVPA]) were: age; Gross Motor Function Classification System level; comorbid autism spectrum disorder (ASD); Goal Attainment Scaling T score; Problems in Schools Questionnaire; Physical Activity Climate Questionnaire; Motives for Physical Activities Measure-Revised; and stage of behaviour change. Multivariable models were selected using the Bayesian information criterion. RESULTS Overcoming barriers to participation, age, and comorbid ASD explained 49% of the variance in change in COPM-performance. Being motivated by interest and/or enjoyment and age explained 32% of the variance in change in COPM-satisfaction. Being motivated by physical activity competence or appearance (extrinsic motivation) explained 24% of the variance in change in BiGSS. Parental autonomy supportiveness, overcoming barriers to participation, appearance motivation, and baseline MVPA explained 59% of the variance in change in MVPA. INTERPRETATION These findings support a behaviour paradigm for conceptualizing physical activity in children with CP.

中文翻译：

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脑瘫儿童休闲体育活动干预的参与预测因素

目的 使用 ParticiPAte CP 协议确定脑瘫 (CP) 儿童对以参与为中心的休闲时间体育活动干预响应的变化幅度的预测因子。方法 我们纳入了 33 名 8 至 12 岁（平均年龄 = 10 岁，SD = 1 岁 6 个月）患有 CP 的儿童（16 名男性，17 名女性），以及来自等待名单随机试验的干预前/干预后数据。主要结果变化的假设线性预测因子（加拿大职业表现测量 [COPM] 表现和 COPM 满意度、目标自我能力量表 (BiGSS) 和每天中度至剧烈运动 [MVPA] 分钟数）是：年龄；大运动功能分类系统级别；共病自闭症谱系障碍（ASD）；目标实现量表 T 分数；学校问题问卷；体力活动气候问卷；体育活动的动机措施 - 修订；和行为改变阶段。使用贝叶斯信息标准选择多变量模型。结果 克服参与障碍、年龄和合并 ASD 解释了 COPM 表现变化的 49%。受兴趣和/或享受和年龄的驱使解释了 COPM 满意度变化的 32%。受到身体活动能力或外表（外在动机）的激励，解释了 BiGSS 变化的 24%。父母自主支持、克服参与障碍、外表动机和基线 MVPA 解释了 MVPA 变化的 59%。解释 这些发现支持了一种行为范式，用于概念化 CP 儿童的身体活动。