Reason behind Death Relating to Postnatal Age From 2000 through 2011, deaths among infants who died within 12 hours after birth were mostly attributed to immaturity . For infants surviving than 12 hours longer, deaths were mostly related to the respiratory distress syndrome; this condition was considered to underlie 49.5 percent of deaths in the first 14 days and 42.8 percent of deaths in the first month of life. From 15 to 60 postnatal times, necrotizing enterocolitis was the most frequent cause of death; after 60 days, bronchopulmonary dysplasia became the predominant cause of death. We identified some potential misclassification between deaths because of the respiratory distress syndrome and deaths because of bronchopulmonary dysplasia ; however, the overall outcomes of a sensitivity evaluation to account for this misclassification were consistent with those of the principal analysis .‘Like the population in this study, contact with secondhand smoke is still a problem in the U.S., suggesting value in extra research,’ he said. For this study, experts collected data on 77 nearly,000 children born between 2004 and 2010. The children had been examined at birth, 4, 9 and 18 months old and at three years of age. In addition, their moms completed questionnaires about cigarette smoking in the real home, with their child’s contact with secondhand smoke cigarettes, their dietary habits and dental care. About 55 % of the parents smoked and nearly 7 % of the children were exposed to secondhand smoke, the researchers found. In all, nearly 13,000 cases of cavities were identified. Dr. Rosie Roldan, director of the pediatric dental care middle at Nicklaus Children’s Hospital in Miami, said that tobacco smoke may change the saliva and additional biochemistry had a need to clean and protect teeth.