Secular trends of low birthweight and macrosomia and related maternal factors in Beijing, China: a longitudinal trend analysis

BMC Pregnancy and Childbirth

Jie Mi³  Chunying Tan¹  Xiaohong Liu¹  Hong Qi¹  Xue Zhang²  Honghong Teng²  Minghui Wu²  Yue Teng¹  Juan Zhao²  Wenpeng Wang³  Fangfang Chen³  Xiaoyi Shan³ 

[1] HAIDIAN Maternity and Child Health Care Hospital, Beijing, China;Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China;Department of Epidemiology, Capital Institute of Pediatrics, Beijing 100020, China

关键词: Gestational diabetes;    Gestational weight gain;    Trends;    Macrosomia;    Low birthweight;   

Others  :  1127503
DOI  :  10.1186/1471-2393-14-105

 received in 2013-03-07, accepted in 2014-03-11,  发布年份 2014

【 摘 要 】

Background

Information tracking changes of birthweight is scarce in China. To examine trends of low birthweight (birthweight < 2500 g) and macrosomia (birthweight ≥ 4000 g) and potential risk factors in Beijing, hospital records from two major obstetrics and gynecology hospitals in urban districts in Beijing were analyzed.

Methods

Hospital records from 1996 to 2010 were retrieved. Information of prenatal examination and birth outcomes was entered into a structured database. Live births were used for trend analysis. Information of live births in 2010 was used to identify potential risk factors.

Results

A total of 63 661 live births were delivered during 1996–2010 in the study hospitals. The average birthweight increased from 3271 g in 1996 to 3 359 g in 2000 and slightly declined to 3 331 in 2010. The percentage of low birthweight fluctuated around 4.0%. No significant increase or decrease was observed. Preterm birth was the main cause of low birthweight, accounting for more than 73% of low birthweight. The average percentage of macrosomia was 7.6%. The percentages of macrosomia increased from 6.6% in 1996 to 9.5% in 2000 and declined to 7.0% in 2010. Excessive gestational weight gain and gestational diabetes were significantly associated with macrosomia.

Conclusions

Continuously monitoring abnormal birthweight is needed and intervention should focus on appropriate gestational weight gain and reduction of preterm birth and gestational diabetes.

【 授权许可】

   
2014 Shan et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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