Atalah Samur E, Castillo Lancelloti C
Departamento de Nutrición, Facultad de Medicina, Universidad de Chile, Unidad de Nutrición, Ministerio de Salud.
Arch Latinoam Nutr. 1997 Mar;47(1):29-33.
The aim of this study was to evaluate the growth of Chilean infants from medium-to-low socioeconomic status fed according to the current WHO guidelines. Growth pattern was compared to a recent reference chart published by WHO for infants, and the NCHS/WHO growth standards. The source of information was a nation-wide infant feeding survey conducted in 1993. From this database, infants aged 1-12 month +/- 5 days, with exclusive breast feeding until the fourth or sixth month were selected (939 males, 940 females). The weight-for-age z-score (WAZ), and the height-for-age z-score (HAZ) were calculated using both the NCHS/ WHO and the new WHO reference growth charts. At each month of age, WHZ and HAZ results were grouped in the following categories: < = -2.0; -1.9 to -1.0; 0 +/- 0.9; 1.0 to 1.9; and > = 2.0. Observed WAZ at the first month of age was below the new WHO reference chart (0.32 z-score), increasing up to 1.29 z-score at the tenth month. The HAZ results were lower the WHO reference chart throughout the period studied, although a trend to improved values was noted during the second semester (F = 6.01 p < 0.001). Growth pattern of the studied group was more similar to the NCHS/WHO chart than the new chart proposed by WHO. As a consequence, the new WHO reference chart identifies a higher proportion of the infants as having a subnormal nutritional status during the first semester of life, compared to those classified in this category by the NCHS/WHO standards (p < 0.001). This can be a factor for the introduction of complementary foods early in life. The relative homogeneity of the population used as source of the WHO reference chart may limit it use in developing countries.
本研究的目的是评估按照世界卫生组织（WHO）现行指南喂养的智利中低社会经济地位婴儿的生长情况。将生长模式与WHO最近发布的婴儿参考图表以及美国国家卫生统计中心/世界卫生组织（NCHS/WHO）生长标准进行比较。信息来源是1993年进行的一项全国性婴儿喂养调查。从该数据库中，选取了年龄在1至12个月±5天、纯母乳喂养至第4或第6个月的婴儿（939名男性，940名女性）。使用NCHS/WHO和新的WHO参考生长图表计算年龄别体重z评分（WAZ）和年龄别身高z评分（HAZ）。在每个月龄，WHZ和HAZ结果分为以下几类：<= -2.0；-1.9至-1.0；0±0.9；1.0至1.9；以及>= 2.0。观察到的1月龄WAZ低于新的WHO参考图表（0.32 z评分），在第10个月时增至1.29 z评分。在整个研究期间，HAZ结果均低于WHO参考图表，不过在第二学期有改善的趋势（F = 6.01，p < 0.001）。与WHO新提出的图表相比，研究组的生长模式与NCHS/WHO图表更为相似。因此，与按照NCHS/WHO标准分类的婴儿相比，新的WHO参考图表在生命的第一学期将更高比例的婴儿识别为营养状况低于正常水平（p < 0.001）。这可能是在生命早期引入补充食物的一个因素。作为WHO参考图表来源的人群相对同质化可能会限制其在发展中国家的应用。
