The article presents the analysis of distribution of medical social characteristics and determinants of style of life of mothers in the groups with premature and urgent/delayed deliveries registered in the Register of deliveries of the Arkhangelsk oblast from 01.01.12 to 31.12.14 (n = 43 327). As compared with the group of urgent/delayed deliveries in the group of premature deliveries (n = 2458 or 5.8% of total number of deliveries), the analysis revealed a large percentage mothers characterizing by non-working, single or without marriage registration, smoking, alcohol abusing, lately registered with their pregnancy, lower education level, aged 35 and older, surplus body mass/obesity. The regression analysis generating odds ratio adjusted to all analyzed characteristics, established statistically reliable increasing of risk of premature delivery in primipara and secundipara females older than 35 years and also having the mentioned risk factors except absence of employment of mother. The established risk factors of premature delivery are to be considered in planning activities on their prevention at the individual level.
Keywords: premature delivery; register of delivery; risk factors.