Potential determinants of participation in leisure-time activities in JIA identified in the systematic review.

PA, Physical activity.**The association between physical fitness and physical activity may be bidirectional, i.e. physical fitness can be both a determinant and an outcome of PA [29].Potential determinants of participation in leisure-time activities in JIA identified in the systematic review.PA即身体活动（Physical activity）。体适能与身体活动之间的关联可能呈双向性，即体适能既可以作为身体活动（PA）的决定因素，也可作为其结局[29]。本系统综述所识别出的幼年特发性关节炎（JIA, Juvenile Idiopathic Arthritis）患者参与休闲活动的潜在决定因素。