Abstract: Objective To analyze the water consumption,body water content and hydration status of obese school-age children in summer,so as to provide reference for assessing the appropriate consumption of water in obese children. Methods Obese children visited the Department of Nutrition,Beijing Children′s Hospital Affiliated to Capital Medical University from June 2019 to August 2019 were measured for height and weight,and body mass index (BMI) was calculated.Laboratory tests and human body composition analysis were carried out.And questionnaires were used to record the direct water intake and food intake. Results There were 21 male students and 19 female students aged 7-14 years.There were no significant differences on age, height,body weight,BMI and body fat percentage between boys and girls (P＞0.05).The total water intake,direct water intake and food water intake of boys were 2 164 ml/d (644 ml/d),1 069 ml/d (409 ml/d),1 191 ml/d (586 ml/d),and those of girls were 1 943 ml/d (464 ml/d),1 000 ml/d (305 ml/d),973 ml/d (303 ml/d),respectively.The total water consumption of boys was higher than that of girls (P<0.05).No significant differences were found on urine specific gravity and total body water percentage between boys[1.03± 0.01,(45±4)%]and girls[1.03±0.00,(45±4)%],indicating insufficient hydration.Spearman correlation analysis showed that BMI was negatively correlated with body water content(r=-0.575). Conclusions The water consumption of obese boys in school-age boys is higher than that of girls,but their hydration status is insufficient.It is necessary to increase the direct water consumption to improve the hydration status,and children with higher BMI need more water.

Key words: obesity children, water intake, body water content, hydration status

摘要： 目的 分析学龄期肥胖儿童夏季饮水量、身体水分含量及水合状态,以评估肥胖儿童的适宜饮水量。方法 于2019年6-8月期间在首都医科大学附属北京儿童医院营养科就诊的肥胖儿童,测量其身高、体重,并计算体重指数(BMI),进行实验室检查及人体成分分析检测,采用调查表记录直接饮水量及食物水摄入量。结果 男生共21名,女生共19名,均为7~14岁。男生和女生的年龄、身高、体重、BMI、体脂肪百分比差异均无统计学意义(P>0.05)。男生和女生的总饮水量、直接饮水量和食物水摄入量分别为2 164 ml/d (644 ml/d)、1 069 ml/d (409 ml/d)、1 191 ml/d (586 ml/d)和1 943 ml/d (464 ml/d)、1 000 ml/d (305 ml/d)、973 ml/d (303 ml/d),其中男生总饮水量高于女生(P＜0.05)。男生与女生的尿比重和身体总水分占体重百分比差异均无统计学意义(P>0.05),分别为1.03±0.01、(45±4)%和1.03±0.00、(45±4)%,提示机体水合状态不足。Spearman相关分析显示,BMI与身体水分含量呈负相关(r=-0.575)。结论 学龄期肥胖男生饮水量高于女生,但身体水合状态均不足,需增加直接饮水量以改善水合状态。BMI越高的儿童,需要的饮水量越多。

关键词: 肥胖儿童, 饮水量, 身体水分含量, 水合状态