School of Public Health, University of Hong Kong, Pokfulam, Hong Kong.
Department of Social Work and Social Administration, University of Hong Kong, Pokfulam, Hong Kong.
Osteoporos Int. 2018 Apr;29(4):917-925. doi: 10.1007/s00198-017-4361-0. Epub 2017 Dec 28.
This study examined the relationships between activity participation and bone mineralization in children with developmental coordination disorder. Limited participation in physical, recreational, social, and skill-based and self-improvement activities contributed to lower bone mineral content. For improved bone health, these children should participate in a variety of activities, not only physical activities.
Limited activity participation in children with developmental coordination disorder (DCD) may have a negative impact on bone mineral accrual. The objectives of this study were to compare bone mineralization and activity participation patterns of pre-pubertal children with DCD and those with typical development, and to determine the association between activity participation patterns and bone mineralization in children with DCD.
Fifty-two children with DCD (mean age = 7.51 years) and 61 children with typical development (mean age = 7.22 years) participated in the study. Appendicular and total body (less head) bone mineral content (BMC) and bone mineral density (BMD) were evaluated by a whole-body dual-energy X-ray absorptiometry scan. Activity participation patterns were assessed using the Children's Assessment of Participation and Enjoyment (CAPE) questionnaire.
Children with DCD had lower appendicular and total body BMCs and BMDs than children with typical development overall (p < 0.05). They also had lower CAPE total activity and physical activity diversity scores (p < 0.05). After accounting for the effects of age, sex, height, lean mass, and fat mass, the total activity diversity score remained independently associated with leg BMC in children with DCD, explaining 5.1% of the variance (p = 0.030). However, the physical activity diversity score was no longer associated with leg BMC (p = 0.090).
Diversity of activity participation and bone mineralization were lower in pre-pubertal children with DCD. Decreased total activity participation diversity was a contributing factor to lower BMC in the legs of children with DCD.
本研究考察了发育性协调障碍儿童的活动参与度与骨矿化之间的关系。身体活动、娱乐活动、社交活动、技能提升活动和自我提升活动参与度有限，导致骨矿含量降低。为了促进骨骼健康，这些儿童应参与各种活动，而不仅仅是身体活动。
发育性协调障碍（DCD）儿童活动参与度有限可能对骨矿化积累产生负面影响。本研究的目的是比较 DCD 儿童和发育正常儿童的骨矿化和活动参与模式，并确定 DCD 儿童的活动参与模式与骨矿化之间的关联。
52 名 DCD 儿童（平均年龄=7.51 岁）和 61 名发育正常儿童（平均年龄=7.22 岁）参与了本研究。通过全身双能 X 射线吸收仪扫描评估四肢和全身（不包括头部）的骨矿含量（BMC）和骨密度（BMD）。使用儿童参与和享受评估量表（CAPE）评估活动参与模式。
总体而言，DCD 儿童的四肢和全身 BMC 和 BMD 均低于发育正常儿童（p<0.05）。他们的 CAPE 总活动和身体活动多样性评分也较低（p<0.05）。在控制年龄、性别、身高、瘦体重和体脂量的影响后，DCD 儿童的总活动多样性评分与腿部 BMC 仍呈独立相关，解释了 5.1%的方差（p=0.030）。然而，身体活动多样性评分与腿部 BMC 不再相关（p=0.090）。
发育性协调障碍的儿童活动参与多样性和骨矿化程度较低。活动参与多样性减少是 DCD 儿童腿部 BMC 降低的一个促成因素。
