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首页> 外文期刊>Paediatric and perinatal epidemiology >Low birthweight and mortality: the tendency to repeat low birthweight and its association with early neonatal and infant morbidity and mortality.
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Low birthweight and mortality: the tendency to repeat low birthweight and its association with early neonatal and infant morbidity and mortality.

机译：低出生体重和死亡率：重复低出生体重的趋势及其与早期新生儿和婴儿发病率和死亡率的关系。

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Previous studies have demonstrated the tendency to repeat gestational age and birthweight in successive pregnancies and that this tendency is associated with infant survival. Thus, newborn outcome and survival is less favourable if the gestational age and size departs from this maternal tendency. This paper aims to study diseases or conditions that might be associated with this effect. Data were provided through a linkage between three Danish health registries: the Danish Fertility Database, the National Hospital Registry, and the Registry for Preventive Medicine. Such linkage was possible due to the use of unique ID-person numbers. The study included all 8219 second-order low-birthweight (LBW) singleton Danish births, 1980-94, of whom 7811 were liveborn. It was also required that the mother's first delivery took place during that period. The analysis considered 7803 of these births; eight were excluded due to insufficient information. Of the second-order LBW children, 26% had an elder sibling who was also LBW. Early neonatal mortality of a 'non-repeat' LBW birth was 1.3 times higher than 'repeat' LBW births [53.8 vs. 41.2 per 1000; RR 1.31; 95% CI 1.03, 1.65], as was infant mortality [78.4 vs. 60.8 per 1000; RR 1.30; 95% CI 1.06, 1.56]. Also, proportionately more LBW repeat births had Apgar scores of >or=7 after 1 and 5 min. Overall, repeat second-order LBW babies weighed 68 g more than non-repeat LBW babies (P < 0.001). At term, the weight difference was 160 g higher among repeat LBW births (P < 0.001). The mean number of hospitalisations during the first year of life was lower among repeat than non-repeat LBW babies (2.30 vs. 2.46, P < 0.001), while the mean duration of stay was 23.71 vs. 23.97 days (P > 0.05). Newborn immaturity was the most common diagnosis for hospitalisation, and infections the second most common. There were no differences between repeat and non-repeat LBW births in the proportion with each diagnosis. Apart from the differences in birthweight, we were unable to explain the improved survival for repeat compared with non-repeat LBW babies. Except for differences in Apgar scores, we observed no differences in morbidity based on registered hospitalisations during infancy.
机译：先前的研究表明，在连续妊娠中重复胎龄和出生体重的趋势与婴儿的存活率有关。因此，如果胎龄和身高偏离了孕产妇的趋势，那么新生儿的结局和存活率将降低。本文旨在研究可能与此效应有关的疾病或状况。通过三个丹麦卫生注册机构之间的链接来提供数据：丹麦生育力数据库，国家医院注册机构和预防医学注册机构。由于使用了唯一的身份证号码，所以这种联系是可能的。该研究纳入了1980-94年间所有8219例二阶低体重（LBW）丹麦单胎出生的婴儿，其中7811例活产婴儿。还要求母亲在此期间首次分娩。分析认为其中有7803例出生。由于信息不足，排除了八个。在二阶LBW儿童中，有26％的同父异母兄弟也是LBW。 “非重复” LBW婴儿的早期新生儿死亡率是“重复” LBW婴儿的1.3倍[53.8 vs. 41.2 /千; RR 1.31; 95％CI 1.03，1.65]，婴儿死亡率[78.4 vs. 60.8 / 1000;相对比1.30; 95％CI 1.06，1.56]。同样，在1分钟和5分钟后，更多的LBW重复出生的Apgar分数大于或等于7。总体而言，重复性二阶LBW婴儿比非重复性LBW婴儿重68克（P <0.001）。足月时，在重复的LBW出生中，体重差异增加了160 g（P <0.001）。重复出生的第一年婴儿的平均住院次数低于未重复出生的LBW婴儿（2.30比2.46，P <0.001），而平均住院时间为23.71比23.97天（P> 0.05）。新生儿不成熟是住院的最常见诊断，而感染次之。在每次诊断中，重复和不重复LBW出生的比例没有差异。除了出生体重的差异外，我们无法解释与非重复性LBW婴儿相比，重复性存活率提高。除了Apgar评分的差异外，我们在婴儿期未发现因登记住院而导致的发病率差异。

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