Estimates of prevalence of musculoskeletal pain in children and adolescents vary considerably and the impact of pain on children's life is often not considered. To determine the one-month prevalence of disabling musculoskeletal pain in children and adolescents. The secondary aims are to: 1) determine the body region with the highest prevalence; 2) understand the characteristics of the children with disabling musculoskeletal pain; and 3) describe the parents' perception of the prevalence. This cross-sectional study was conducted in public and private schools in the states of São Paulo and Ceará, Brazil. Children self-reported presence and impact of pain, pain intensity, psychosomatic symptoms, and quality of life. Parents completed parent-proxy versions and perception of the child's sleep quality. Descriptive statistics were used to summarise the data. A total of 2,688 children and adolescents were included in this study. The prevalence of disabling musculoskeletal pain in the previous month was 27.1%. The back was the region most often affected (51.8%). Children with disabling musculoskeletal pain were older, heavier, had worse relationships with their family, perceived their backpacks as heavy, carried their backpacks more with one shoulder, had more negative psychosomatic symptoms, had poorer quality of life, and had higher pain intensity. Parents tended to underestimate the presence of pain in their children. The one-month prevalence of activity limiting musculoskeletal pain in children and adolescents was 27.1% with the back being the most often affected body region. Parents tended to underestimate the presence of pain in their children.

中文翻译：

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巴西儿童和青少年致残性肌肉骨骼疼痛的患病率：一项横断面研究

对儿童和青少年肌肉骨骼疼痛患病率的估计差异很大，并且通常没有考虑疼痛对儿童生活的影响。确定儿童和青少年致残性肌肉骨骼疼痛的一个月患病率。次要目标是：1）确定患病率最高的身体区域；2）了解致残性肌肉骨骼疼痛患儿的特点；3) 描述父母对患病率的看法。这项横断面研究是在巴西圣保罗州和塞阿拉州的公立和私立学校进行的。儿童自我报告疼痛的存在和影响、疼痛强度、心身症状和生活质量。父母完成了父母代理版本和对孩子睡眠质量的看法。使用描述性统计来总结数据。这项研究共有 2,688 名儿童和青少年。上个月致残性肌肉骨骼疼痛的患病率为 27.1%。背部是最常受影响的区域（51.8%）。患有肌肉骨骼疼痛的儿童年龄较大，体重较重，与家人的关系较差，认为背包很重，更多地用一只肩膀扛背包，有更多的负面心身症状，生活质量较差，疼痛强度较高。父母往往低估了孩子所承受的疼痛。儿童和青少年活动限制性肌肉骨骼疼痛的 1 个月患病率为 27.1%，其中背部是最常受影响的身体区域。父母往往低估了孩子所承受的疼痛。