Background: Factors contributing to perinatal mortality (PM) in Northwest Russia remain unclear. This study investigated possible associations between selected maternal and fetal characteristics and PM based on data from the population-based Murmansk County Birth Registry. Objective: This study investigated possible associations between selected maternal and fetal characteristics and PM based on data from the population-based Murmansk County Birth Registry. Methods: The study population consisted of all live- and stillbirths registered in the Murmansk County Birth Registry during 2006–2011 (n = 52,806). We excluded multiple births, births prior to 22 and after 45 completed weeks of gestation, infants with congenital malformations, and births with missing information regarding gestational age (a total of n = 3,666) and/or the studied characteristics (n = 2,356). Possible associations between maternal socio-demographic and lifestyle characteristics, maternal pre-pregnancy characteristics, pregnancy characteristics, and PM were studied by multivariable logistic regression. Crude and adjusted odds ratios with 95% confidence intervals were calculated. Results: Of the 49,140 births eligible for prevalence analysis, 338 were identified as perinatal deaths (6.9 per 1,000 births). After adjustment for other factors, maternal low education level, prior preterm delivery, spontaneous or induced abortions, antepartum hemorrhage, antenatally detected or suspected fetal growth retardation, and alcohol abuse during pregnancy all significantly increased the risk of PM. We observed a higher risk of PM in unmarried women, as well as overweight or obese mothers. Maternal underweight reduced the risk of PM. Conclusions: Our results suggest that both social and medical factors are important correlates of perinatal mortality in Northwest Russia.

This study aimed to assess whether adolescents have an increased risk of adverse pregnancy outcomes (APO) compared to adult women. We used data on 43,327 births from the population-based Arkhangelsk County Birth Registry, Northwest Russia, for 2012–2014. The perinatal outcomes included stillbirth, preterm birth (<37 and <32 weeks), low and very low birthweight, 5 min Apgar score <7 and <4, perinatal infections, and the need for neonatal transfer to a higher-level hospital. Multivariable logistic regression was applied to assess the associations between age and APO. Altogether, 4.7% of deliveries occurred in adolescents. Both folic acid intake and multivitamin intake during pregnancy were more prevalent in adults. Adolescents were more likely to be underweight, to smoke, and to have infections of the kidney and the genital tract compared to adult women. Compared to adults, adolescents were at lower risk of low birthweight, a 5 min Apgar score <7, and need for neonatal transfer. Adolescents had no increased risk of other APO studied in the adjusted analysis, suggesting that a constellation of other factors, but not young age per se, is associated with APO in the study setting.

The article presents a short review of already established birth registries worldwide and their value for public health and perinatal medicine. Implementation of Arkhangelsk County Birth Registry (ACBR) is presented in detail. Paper registration form contains information on maternal pre-pregnancy and pregnancy health status, reproductive history, data on folic acid and multivitamin intake as well as alcohol consumption and tobacco smoking before and during pregnancy. Pregnancy outcomes with data on babies' anthropometry and Apgar score are also recorded. For sick liveborn infants, diagnosis and provided treatment are specified. Practical issues of ACBR implementation including the process of transferring data from registration paper forms to computer database are described. From January 1, 2012 to December 31, 2014, 43 327 births were recorded in the ACBR. It comprises 99.6 % of all stillborn and liveborn infants with gestational age 22 and more weeks born in Arkhangelsk County in 2012-2014. Four hundred ninety four births (1.1 %) are multiple. In 2013 and 2014, quality controls demonstrated that 97.3% records in computer database are identical to data in paper registration forms. Ethical and legal issues are discussed. All records in the ACBR are depersonalized. Some practical issues as well as future perspectives of the ACBR for cohort and cross-sectional studies in a field of perinatal epidemiology are also discussed.

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BackgroundSmall for gestational age (SGA) births have been associated with both short- and long-term adverse health outcomes. Although social risk factors for SGA births have been studied earlier, such data are limited from Northern Russia.ObjectiveWe assessed maternal social risk factors for term SGA births based on data from the population-based Murmansk County Birth Registry (MCBR).DesignData on term live-born singleton infants born between 2006 and 2011 in Murmansk County were obtained from the MCBR. We applied the 10th percentile for only birth weight (SGAW) or for both birth weight and birth length (SGAWL). Binary logistic regression was used to estimate the effect of independent variables on SGA males and females with adjustment for known risk factors and potential confounders. Both crude and adjusted odds ratios with 95% confidence intervals for the studied risk factors were calculated.ResultsThe proportions of term SGAW and SGAWL births were 9.7 and 4.1%, respectively. After adjustment for potential confounders, the risk of term SGA births among less educated, unemployed, unmarried, smoking and underweight women was higher compared with women from the reference groups. Evidence of alcohol abuse was also associated with birth of SGAWL and SGAW boys. Maternal overweight and obesity decreased the risk of SGA.ConclusionsMaternal low education, unemployment, unmarried status, smoking, evidence of alcohol abuse and underweight increased the risk of term SGA births in a Russian Arctic setting. This emphasizes the importance of both social and lifestyle factors for pregnancy outcomes. Public health efforts to reduce smoking, alcohol consumption and underweight of pregnant women may therefore promote a decrease in the prevalence of SGA births.

Introduction Periconceptional use of folic acid supplementation is an evidence-based measure of birth defects prevention. The study was aimed to assess effect of periconceptual use of folic acid on birth defect prevalence in Arkhangelsk county and to investigate socio-demographic factors, which are associated with adherence to this preventive measure. Methods A registry-based study was conducted with data from the Arkhangelsk County Birth Registry for 2012-2015. The study population included 57084 pregnancies to calculate the proportion of women taking folic acid and 53340 pregnancy outcomes without missing data to analyze related socio-demographic characteristics. Results The proportion of women followed a folic acid supplementation before pregnancy was 1.3% (95% CI: 1.2-1.4), during pregnancy - 55.8% (95%CI: 54.6-56.4). Such women had less risk to deliver a newborn with any birth defects (OR = 0,84, 95%CI: 0,75 - 0,95). Considering birth defects prevalence of 38,6 per 1000 newborns in Arkhangelsk county, number needed to prevent one case of birth defect was 142,9. Based on multivariate analysis, nulliparous married women with higher education, aged 30 or more, had a higher chance to use folic acid before and during pregnancy. The history of spontaneous abortion in the mother's medical history and the first pregnancy were negatively associated with the probability of folic acid intake both before and during pregnancy. Conclusions The compliance to periconceptional intake of folic acid among women in the region was low. A level of compliance was associated with such socio-demographic factors as age, education, marital status, gravidity and parity. The findings have direct applications in improving prenatal care in Arkhangelsk county and establishing targets for prenatal counseling. Key messages A level of compliance to primary prevention of birth defects is associated with such socio-demographic factors as age, education, marital status, gravidity and parity. Prenatal counseling in terms of birth defects prevention should be based on socio-demographic characteristics of pregnant women.

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Until now, national percentiles and curves for twins based on population registry data have not been published. It complicates the diagnosis of fetal growth retardation. In the article, the algorithms of birth weight, length and head circumference percentiles and curves for twins born alive at gestational age 32-40 weeks are described. We used data from the population-based Murmansk County Birth Registry (2006-2011) and the Arkhangelsk County Birth Registry (2012-2014), Russian Federation. Data on 1 567, 1 631 и 1 628 newborns were used to create birth weight, length and head circumference percentiles, respectively. Gestational-specific curves present data on 10th, 50th and 90th percentiles. Mean birth weight and head circumference in males were higher compared to corresponding parameters in females at any gestational age. At 32 weeks of pregnancy mean birth length in females was higher compared to length in males. In our current study, the database was comprehensive enough to be representative for the population. Conclusively, the results of the study will be valuable for clinical practice across other regions of the Russian federation.