BACKGROUND Obesity in the pediatric population is a severe public health problem and is associated with various comorbidities. Renal length is an important clinical parameter for the diagnosis and follow-up of renal diseases. The aim of this study was to determine the relationship between renal length (measured ultrasonographically) and body mass index (BMI) in obese children, and to develop nomograms for renal length according to BMI. METHODS Renal ultrasound was performed in 368 children without renal disease. Each child's age, gender, weight, height, and BMI (kg/m2) were recorded. The children were divided into three groups according to BMI percentiles: obese group: BMI ≥ 95th percentile; overweight group: BMI 85th-94th percentile; normal weight group: BMI 5th-84th percentile. RESULTS Weight, height, BMI, and right and left renal length differed significantly between the three groups (p = 0.001). There were significant correlations between renal length with age, weight, height, and BMI. Measurement of renal length was independently associated with BMI, age, and height. BMI was used to create renal length nomograms for obese children, based on multiple regression analysis (R2 = 0.32 and p = 0.0001). Mean renal length was highest in the obese group (96.9 ± 13.4 mm) and lowest in the normal weight group (88.3 ± 12.9 mm). CONCLUSIONS Ultrasonographic measurement of the renal length according to BMI in children can be a useful method in evaluating these children. Smaller-than-normal kidneys can easily remain undiagnosed in obese and overweight children and this nomogram offers an additional method to evaluate the renal size in obese children.

中文翻译：

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肥胖儿童体重指数与肾脏长度的关系。

背景技术小儿人群中的肥胖是严重的公共卫生问题，并且与多种合并症相关。肾脏长度是诊断和随访肾脏疾病的重要临床参数。这项研究的目的是确定肥胖儿童的肾脏长度（超声检查）与体重指数（BMI）之间的关系，并根据体重指数绘制肾脏长度的诺模图。方法对368例无肾脏疾病的儿童进行了肾脏超声检查。记录每个孩子的年龄，性别，体重，身高和BMI（kg / m2）。根据BMI百分位数将儿童分为三组：肥胖组：BMI≥95％； BMI≥95％。超重人群：体重指数（BMI）85-94％；正常体重组：BMI介于第5-84％。结果体重，身高，体重指数，三组之间的右肾和左肾长度明显不同（p = 0.001）。肾脏长度与年龄，体重，身高和BMI之间存在显着相关性。肾脏长度的测量与BMI，年龄和身高独立相关。基于多元回归分析（R2 = 0.32和p = 0.0001），BMI用于创建肥胖儿童的肾脏长度列线图。肥胖组平均肾脏长度最高（96.9±13.4 mm），而正常体重组最低（88.3±12.9 mm）。结论根据BMI对儿童的肾脏长度进行超声检查可作为评估这些儿童的有用方法。肥胖和超重儿童的肾脏比正常人更容易被诊断，该诺模图提供了另一种评估肥胖儿童肾脏大小的方法。