Institute of Behavioural Sciences, PO Box 9, 00014 University of Helsinki, Helsinki, Finland.
Pediatrics. 2013 Oct;132(4):647-55. doi: 10.1542/peds.2013-0951. Epub 2013 Sep 30.
We examined if those born late-preterm (at 34 to 36 weeks of gestation) differed from those born at term in their maximum attained lifetime socioeconomic position (SEP) across the adult years up to 56 to 66 years, and in intergenerational social mobility from childhood parental SEP to own attained SEP.
Participants were 8993 Finnish men and women of the Helsinki Birth Cohort Study born between 1934 and 1944. Gestational age was extracted from hospital birth records and socioeconomic attainments from Finnish National Census.
Compared with those born at term, those born late-preterm were more likely to be manual workers, have a basic or upper secondary level of education, belong to the lowest third based on their incomes, and less likely to belong to the highest third based on their incomes. Late-preterm individuals were also less likely to be upwardly mobile and more likely to be downwardly mobile; they were less likely to have higher occupations and more likely to have lower occupations than their fathers. They were also less likely to be upwardly mobile if incomes were used as the outcome of own attained SEP, and men were more likely to be downwardly mobile if education was used as the outcome of own attained SEP.
This study demonstrates that there are considerable long-term socioeconomic disadvantages associated with late-preterm birth, which are not explained by the parent-of-origin SEP.
我们研究了那些在妊娠 34 至 36 周（晚期早产）出生的人，与那些足月出生的人相比，在成年后的整个过程中，他们是否在最大程度上达到了终身社会经济地位（SEP），以及在从儿童期父母的 SEP 到自己获得的 SEP 的代际社会流动方面存在差异。
参与者为出生于 1934 年至 1944 年期间的芬兰赫尔辛基出生队列研究的 8993 名男性和女性。胎龄从医院出生记录中提取，社会经济地位从芬兰国家人口普查中获得。
与足月出生的人相比，晚期早产儿更有可能从事体力劳动，接受基本或中等后教育，根据收入属于最低三分之一，而不太可能属于最高三分之一。晚期早产儿也不太可能向上流动，更有可能向下流动；他们不太可能从事比父亲更高的职业，而更有可能从事比父亲更低的职业。如果使用收入作为自己获得的 SEP 的结果，他们也不太可能向上流动，如果使用教育作为自己获得的 SEP 的结果，男性更有可能向下流动。
这项研究表明，晚期早产与相当大的长期社会经济劣势有关，这不能用父母的 SEP 来解释。
