Incidence of low birth weight of neonates and the influencing factors in China
Yu, D-Mei.; Zhao, L-Yun.; Liu, A-Dong.; Yu, W-Tao.; Jia, F-Mei.; Zhang, J-Guo.; Zhai, F-Ying.
Zhonghua Yu Fang Yi Xue Za Zhi 41(Suppl): 150-154
2007
ISSN/ISBN: 0253-9624 PMID: 17767884 Document Number: 605370
Objective To analyze the incidence of low birth weight and identify the influencing factors in China in 2006. Methods The national survey was performed by stratified random cluster sampling method in 43 cities and counties in 14 provinces. The subjects were all live neonates during May to October in 2006. Their body weight was measured according to the standardization conducted by the national research team, wh,ile the information of all infants was investigated by questionnaires. Non-conditional logistic regression was used to analyze the influencing factors. Results Among 18 554 infants investigated, the incidence of low birth weight was 4.6% in 2006 in China, being 3.2%, 4.4%, and 6.3% in eastern middle and western areas respectively. The incidence of low birth weight were 3.9% in urban and 4.8% in rural. The results of logistic regression analysis suggested that maternal education( OR = 1.48; 95% CI : 1.181 similar to 1.861), body mass index (BMI) before pregnancy( OR = 1.52;95% CI :1.229-1.876), body weight gain in gestation period OR = 1.57;95% CI :1.246-1.965), gestational weeks ( OR = 20.16; 95% CI : 15.456-26.297) multiple birth ( OR = 12.11; 95% CI 9.229-15.893), gestation syndrome, and nutrition instruction ( OR = 0.66;95% CI :0.550-0.798 were associated with low birth weight significantly. Conclusion The main factors resulting in low birth weight in neonates are maternal education, BMI before pregnancy, body weight gain in gestation period, pregnancy age, multiple birth, gestation syndrome, and nutrition instruction.