影响新生儿神经行为发育的多因素分析

背景采用多项有序反应变量的Logistic分析方法,可以从另一个侧面,探讨在子宫内低水平铅暴露状态下,新生儿胎粪铅含量与新生儿神经行为发育之间的关系.目的探讨影响新生儿神经行为发育的多种因素及敏感性.设计以新生儿神经行为总评分作为因变量,以问卷中的影响因素及脐血铅、胎粪铅等24项指标作为自变量,采用多项有序分类反应型变量的Logistic逐步回归分析方法,在P=0.10水平筛选出相应的影响因素.单位武汉科技大学,华中科技大学同济医学院职业病流行病学实验室,中国第一冶金建筑总公司职工医院.对象随机选择武汉市新型工业区的青山区一冶职工医院妇产科1999-0l/10出生的足月、健康新生儿103例作为观察对象,家属同意参加课题研究并填写问卷调查,提供新生儿胎粪,按时进行新生儿测试.方法①在新生儿断脐前采取脐血5 mL,于-4℃的冰箱中冷藏保存.收集出生24 h内的胎便,用石墨炉原子吸收光谱法测定脐血铅与胎粪铅的含量.②新生儿神经行为的检查采用新生儿20项神经行为检查法于分娩第3天进行检查.同时采用自行设计的问卷对产妇进行调查.问卷涉及可能影响新生儿神经发育的其他因素,共22项.③对新生儿神经系统发育有影响的家庭、社会、环境、健康状况以及脐血铅含量、胎粪铅含量共24个变量(其中含2个亚变量)作自变量,以新生儿神经行为评分作为反应变量,筛选出相应的影响因素.主要观察指标筛选出影响新生儿神经行为发育的因素.结果103例新生儿进入结果分析.孕周、孕期服药月份、血红蛋白、孕期情绪、胎粪铅、孕期服药6项因素选入模型.结论新生儿神经行为发育受多项因素的影响.孕期营养状况好、孕周长、孕期情绪好有利于新生儿神经行为的发育.孕期服药不利于新生儿神经行为的发育,尤其是妊娠早期用药.胎粪铅含量增高将不利于新生儿神经行为的发育.

Multivariate analysis of neurobehavioral development in neonates

BACKGROUND: Logistic analysis of multi-ordered response-variable is used to probe into from another view the interrelationship between lead content in fetus faeces and neurobehavioral development under exposure to low-level lead in uterus.OBJECTIVE: To probe into multi-factors of neurobehavioral development in neonates and the sensibility.DESIGN: The total score of neurobehavior in neonates was taken as dependent variable and 24 indexes were as independent variables, such as induced factors, lead in umbilicus blood and lead in fetus faeces in questionnaire. Logistic progressive regression of multi-ordered response-variables was used in analysis and corresponding factors were screened at level of P=0.10.SETTING: Wuhan University of Science and Technology, Laboratory Room of Occupation Disease and Epidemic disease in Tongji Medical College of Huazhong University of Science and Technology and Occupation Hospital of China First Metallurgical Construction General Company.PARTICIPANTS: Totally 103 full-month borne and healthy neonates were randomized in Department of Gynecology of one occupation hospital in Qingshan District of New-type Industry Area of Huanhan City from January to October 1999 as the objects. The relatives agreed with topic research and questionnaire investigation and they provided neonatal faeces and received neonatal tests on time.off the umbilicus and preserved in freezing in refrigerator at -4 ℃. The faeces in 24 hours after birth was collected and the lead contents of umbilicus blood and faeces were assayed with graphite furnace atomic absorpBehavioral Neurological Assessment (NBNA) was used in examination on the 3rd day after delivery. Simultaneously, the self-designed questionnaire was adopted in the investigation for parturients. The questionnaire involved other possible factors of neonatal neurobehavioral development, including dependent variables, concerning to states of family, society, environment and health that affected neurological development in neonates and lead contents in umbilicus blood and faeces. Scores of neonatal neurobehavior were taken as response variables. Finally, the corresponding factors were screened.MAIN OUTCOME MEASURES: To screen the factors of neurobehavioral development of neonates.RESULTS: Totally 103 cases entered result analysis. Six factors were selected in the model, named pregnant weeks, the month of drug administration in pregnancy, hemoglobin, emotions in pregnancy, lead level in fetus faeces and drug administration.CONCLUSION: Neonatal neurobehavioral development was related to multiple factors. Good nutrient in pregnancy, long pregnant weeks and good emotions in pregnancy benefit neurobehavioral development of neonates. Drug administration during pregnancy is disadvantageous in neonatal neurobehavioral development, especially the medication at the early phase of pregnancy. The increased lead content in neonatal faeces does not benefit neonatal neurobehavioral development.