ABSTRACT
The study was conducted to determine the combined effect of birthweight and gestational age at birth on neonatal mortality using individually-identified livebirths. Logistic regression was used for studying the interactive effect of birthweight and gestational age on the individual probability of neonatal death. All livebirths from Chile in 2000 were included in a linked file. Odds ratio models for birthweight and gestational age were developed for each sex. The probability of neonatal death by sex was presented using contour plots. The models were statistically significant, and odds ratios were different and non-linear for the effects of birthweight and gestational age. Contour plots of constant neonatal mortality according to birthweight and gestational age were presented; they were similar for each sex. A single graph for both sexes that estimates the survival potential of infants born too early or too small would improve neonatal care in developing countries.
Subject(s)
Birth Weight , Chile , Female , Gestational Age , Humans , Infant Care/standards , Infant Mortality , Infant, Newborn , Logistic Models , Male , Survival AnalysisABSTRACT
Objective. To assess the impact that a mother-to-mother support program operated by La Leche League Guatemala had on early initiation of breast-feeding and on exclusive breast-feeding in peri-urban Guatemala City, Guatemala. Materials and Methods. A population census was conducted to identify all mothers of infants < 6 months of age, and the mothers were then surveyed on their breast-feeding practices, in two program communities and two control communities. Data collection for this follow-up census and survey was carried out between November 2000 and January 2001, one year after a baseline census and survey had been conducted. Results. At follow-up, 31 percent of mothers in the program communities indicated that counselors had advised them about breast-feeding, 21 percent said they had received a home visit, and 16 percent reported attending a support group. Communitywide rates of early initiation of breast-feeding were significantly higher in program areas than in the control communities, at both baseline and follow-up. However, the change over time in early initiation in program communities was not significantly different from the change in control communities. Communitywide rates of exclusive breast-feeding were similar in program and control sites and did not change significantly from baseline to follow-up. However, of the mothers in the program communities who both received home visits and attended support groups, 45 percent of them exclusively breast-fed, compared to 14 percent of women in program communities who did not participate in those two activities. In addition, women who were exposed to mother-to-mother support activities during the year following the baseline census and survey were more likely than mothers exposed before that period to exclusively breast-feed. This suggests that the program interventions became more effective over time. Conclusions. This study does not provide evidence of population impact of La Leche League's intervention after one year of implementation. In peri-urban Guatemala, long-term community-based interventions, in partnership with existing health care systems, may be needed to improve communitywide exclusive breast-feeding rates