Dietz W H, Hartung R
Am J Dis Child. 1985 Jul;139(7):705-7. doi: 10.1001/archpedi.1985.02140090067031.
Height velocities prior to and during weight reduction were determined retrospectively in 19 obese children selected because of a 10% or greater fall in weight for height. Mean duration of the weight reduction period was 9.7 months. All children were treated with a balanced calorie-deficit diet containing 1.5 to 2.0 g of protein per kilogram of ideal body weight per day. Height velocities were normalized by calculating the Z score for each one. Prior to weight reduction, the mean (+/- SD) Z score for height velocity was 2.32 +/- 2.47 units. Eleven patients were 2 SDs or more above the mean height velocity for age and sex. During weight reduction, the mean Z score for height velocity decreased significantly to 0.62 +/- 2.37 units. The change in Z score before and during weight reduction was significantly correlated with the change in weight but not with the change in weight for height. These data indicate that even mildly restrictive diets may be associated with a reduction in linear growth velocity. The implications of these observations for the risk of other adverse consequences of weight reduction are not clear. Nonetheless, our observations emphasize the importance of careful monitoring of obese children during mildly restrictive dietary therapy.
对19名肥胖儿童进行回顾性研究，这些儿童因身高别体重下降10%或更多而被挑选出来，以确定其体重减轻之前和期间的身高增长速度。体重减轻期的平均持续时间为9.7个月。所有儿童均接受平衡的热量不足饮食治疗，每天每千克理想体重摄入1.5至2.0克蛋白质。通过计算每个儿童的Z分数对身高增长速度进行标准化。体重减轻前，身高增长速度的平均（±标准差）Z分数为2.32±2.47单位。11名患者的身高增长速度高于同年龄、同性别的平均水平2个标准差或更多。在体重减轻期间，身高增长速度的平均Z分数显著下降至0.62±2.37单位。体重减轻前后Z分数的变化与体重变化显著相关，但与身高别体重变化无关。这些数据表明，即使是轻度限制性饮食也可能与线性生长速度降低有关。这些观察结果对体重减轻的其他不良后果风险的影响尚不清楚。尽管如此，我们的观察结果强调了在轻度限制性饮食治疗期间仔细监测肥胖儿童的重要性。
