Objective

To indicate neck circumference (NC) cutoff points to identify excess weight at different stages of somatic maturation and evaluate the association between NC and body mass index (BMI).

Methods

Cross-sectional study with 1715 adolescents. BMI was classified according to the World Health Organization (WHO) criteria. Somatic maturation was obtained through the peak growth velocity (PGV). To define the cutoff points, curves of the receiver operating characteristic (ROC) model were constructed. The agreement between the anthropometric evaluation instruments was analyzed. The association between the variables was verified.

Results

Of the girls, 93 were in the pre-PGV stage, 266 in the PGV stage, and 481 in the post-PGV stage. Of the boys, 264 were in the pre-PGV stage, 334 in the PGV stage, and 277 in the post-PGV stage. For the pre-PGV group, the cutoff point was 28 cm for females and 29 cm for males; for the group during PGV, the cutoff points were 30 cm for females and 33 cm for males; in the post-PGV group the cutoff values were 32 cm in females and 35 cm in males. The prevalence of excess weight was higher in the pre-PGV stage in males and in the PGV stage in females. The correlation coefficients were higher in the pre-PGV and PGV stages.

Conclusion

The cutoff points for NC found in this study showed good sensitivity and specificity to identify excess weight in Brazilian adolescents and can be used as a reference in epidemiological studies.

中文翻译：

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颈围和超重：巴西青少年的分界点建议

客观的

指示颈围 (NC) 截止点，以识别体细胞成熟不同阶段的超重，并评估 NC 与体重指数 (BMI) 之间的关联。

方法

对 1715 名青少年的横断面研究。BMI根据世界卫生组织（WHO）标准进行分类。通过峰值生长速度（PGV）获得体细胞成熟。为了定义截止点，构建了受试者工作特征 (ROC) 模型的曲线。分析了人体测量评价仪器之间的一致性。验证了变量之间的关联。

结果

在这些女孩中，93 人处于 PGV 前阶段，266 人处于 PGV 阶段，481 人处于 PGV 后阶段。在男孩中，264 人处于 PGV 前阶段，334 人处于 PGV 阶段，277 人处于 PGV 后阶段。对于pre-PGV组，截止点是女性28 厘米，男性29 厘米；对于 PGV 期间的组，截止点是 女性 30 厘米和男性 33 厘米；在 PGV 后组中，女性的截止值为 32 厘米，男性为 35 厘米。男性PGV前阶段超重发生率较高，女性PGV阶段超重发生率较高。PGV前和PGV阶段的相关系数较高。

结论

本研究中发现的 NC 截止点在识别巴西青少年超重方面表现出良好的敏感性和特异性，可用作流行病学研究的参考。