Haas J, Rosegger H, Haim M
Geburtshilflich-gynäkologische Univ.-Klinik Graz.
Z Geburtshilfe Perinatol. 1987 May-Jun;191(3):91-5.
We calculated new birthweight, length and head circumference standards for caucasian boys and girls between 26 and 43 weeks gestation from 28,126 singleton live births at our hospital between 1980 and 1985. Only stillbirths and infants with serious congenital abnormalities were excluded, whereas babies born to mothers suffering from complications known to affect fetal size were considered part of the population to which standards will be applied and thus remained included. The standards were determined from centiles for each gestational week independent of the mode of distribution of the data. The centiles were then "smoothed" using a Hanningfilter. The descriptive analysis showed a skew to the left of all our data and a steep distribution pattern so that the assumption of a normal distribution is incorrect. Comparison with mean values and standard deviations computed from the same data revealed considerable deviations from our results.
我们根据1980年至1985年间我院28126例单胎活产儿的数据，计算了妊娠26至43周的白种男孩和女孩的新生儿体重、身长和头围新标准。仅排除死产儿和患有严重先天性异常的婴儿，而患有已知会影响胎儿大小的并发症的母亲所生的婴儿被视为适用该标准的人群的一部分，因此仍被纳入。这些标准是根据每个孕周的百分位数确定的，与数据的分布模式无关。然后使用汉宁滤波器对百分位数进行“平滑”处理。描述性分析表明，我们所有的数据均向左偏斜且分布模式陡峭，因此正态分布的假设是不正确的。将这些结果与从相同数据计算出的平均值和标准差进行比较，发现与我们的结果存在相当大的偏差。
