The authors of Gortazar et al.¹ have detected a coding error in the variable “prematurity”. This variable included deliveries occurring not only before 37 weeks of gestation but also deliveries occurring during 37 weeks’ gestation. However, preterm deliveries are determined as birth before 37 weeks’ gestation according to the World Health Organization as it was specified in Methods. The error has been amended and the results shown in the Table 1, Table 2, Figure 3 are now responsive for those changes.

Prematurity rates are now calculated by the total number of delivery reports with available gestational age at birth (>97%). Although the rates and OR of preterm births have been modified, the interpretation of odds ratios and trends over time have remained consistent. Moreover, birth weight outcomes were initially calculated by the total number of deliveries. The authors detected that birth weight data were lacking in a slight number of reports. The authors consider that it would be more accurate to calculate the rates of birth weight outcomes by the number of newborns with birth weight data. Delivery reports without birth weight data accounted for less than 2.5%, therefore the figures have been slightly modified. The interpretation of the odds ratio and trends over time have not been altered

Gortazar 等人的作者。¹已检测到变量“早产”中的编码错误。该变量不仅包括妊娠 37 周前的分娩，还包括妊娠 37 周期间的分娩。然而，根据世界卫生组织在方法中的规定，早产被确定为在妊娠 37 周之前出生。错误已得到修正，表 1、表 2、图 3 中显示的结果现在可以响应这些更改。

现在，早产率是通过具有可用出生胎龄 (>97%) 的分娩报告总数来计算的。尽管早产率和 OR 已被修改，但对优势比和趋势的解释仍然保持一致。此外，出生体重结果最初是按分娩总数计算的。作者发现在少量报告中缺乏出生体重数据。作者认为，通过具有出生体重数据的新生儿数量来计算出生体重结果率会更准确。没有出生体重数据的分娩报告占不到2.5%，因此数字略有修改。随着时间的推移，对优势比和趋势的解释没有改变