Incidence of common complications of pregnancy in a municipality in North-West Russia : a study from population-based birth registry
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- Master's theses (IHA) 
Objectives: This is a population–based birth study based on the data from Monchegorsk, which a town in the central part of Murmansk Oblast in North-West Russia. The main objectives are to determine the incidence of common complications in Monchegorsk during 1973-2005, estimate the relevant risk factors to the complications, the relationship between complications, and analyze outcomes of the newborns. Method: The data were obtained from the Kola Birth Register from 1973 to 2005. International Classification of Disease, 10th Revision, codes was used to record the complications. Incidence of the selected complications of pregnancy was described. Annual numbers of selected complications were divided into 5-year groups. The incidence in different time period at 2001-2005 and 1976-1980 was compared by using odds ratio. Chi-Square test for independence and odds ratio has been conducted to indicate the association between the most frequent complications (>10%) and potential risk factors, outcomes of fetus as well. Pearson product-moment correlation coefficient (Pearson’s r) was conducted to discover the correlation between the most frequent complications. Result: In total, 26411 pregnancies were included in the study. The incidence of six complications was over 10%, eight was 1%-10% and two was lower than 1%. Ten of fifteen complications were shown significant increases between 2001-2005 and 1976-1980. Five of six most frequent complications were related to nulliparous women. Two and three of the six Master thesis for public health, Jun. 2012 UMB 6 most frequent complications related to the age group ≤17 and ≥ 35 respectively. Hypertensive disorder was high incidence and significant related to both low birth weight and prenatal death. Conclusions: Several of complications increased during 1973-2005 in the town of Monchegorsk. Infections of genitourinary tract, pregnant hypertensive disorders, premature rupture of membranes, abnormalities of forces of labor were shown in the higher level than in other populations over the investigated period. Especially, hypertensive disorders were higher in Monchegorsk and they had related to both low birth weight and prenatal death. Smoking using was shown in increasing trend and was an important risk factor for occurrence of complications. Women at the age between 18- 34 year-old had less pregnancy complications. Nulliparous women were at the higher risk to suffer from complications.