Birth weight charts for a Chinese population: an observational study of routine newborn weight data from Chongqing
| Autor: | Hua Zhang, Xue Zhao, Philip N. Baker, Tom Norris, Yinyin Xia |
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| Rok vydání: | 2019 |
| Předmět: |
Male
Rural Population 0301 basic medicine China Urban Population Birth weight 030231 tropical medicine Gestational Age 03 medical and health sciences Sex Factors 0302 clinical medicine Reference Values Gestational Weeks Secondary analysis Birth Weight Humans Urban Medicine Rural Chinese population Birth weight centiles business.industry Infant Newborn lcsh:RJ1-570 lcsh:Pediatrics LMS 030104 developmental biology Birth weight centile Pediatrics Perinatology and Child Health Gestation Female Observational study business Rural population Research Article Demography |
| Zdroj: | BMC Pediatrics, Vol 19, Iss 1, Pp 1-9 (2019) BMC Pediatrics |
| ISSN: | 1471-2431 |
| DOI: | 10.1186/s12887-019-1816-9 |
| Popis: | Background To construct birth weight charts for the Chongqing municipality, China and to identify whether differences in birth weight exist across urban/rural populations, thereby warranting separate charts. Methods Secondary analysis of routinely collected data from 338,454 live infants between 2014 and 2017 in Chongqing municipality. Sex-specific birth weight-for-gestational age centiles were constructed by the lambda-mu-sigma method via the GAMLSS R-based package. This method remodels the skewed birth weight distribution to estimate a normal distribution, allowing any birth weight centile to be generated. A separate set of centiles were created, accounting for urban/rural differences in birth weight. Results The centiles performed well across all gestational ages. For example, 2.37% (n = 4176) of males and 2.26% (n = 3656) of females were classified as below the 2nd centile (expected percentage = 2.28%), 49.75% of males (n = 87,756) and 50.73% of females (n = 82,203) were classified as below the 50th centile (expected proportion = 50%) and 97.52% of males (n = 172,021) and 97.48% of females (n = 157,967) were classified as below the 98th centile (expected proportion = 97.72%). The overall estimated centiles of birth weight for rural infants were higher than the centiles for urban infants at the earlier gestational ages ( Conclusion We have constructed a readily utilizable set of birth weight references from a large representative sample of births in Chongqing. The method used to construct the references allows for the calculation of the exact centile for any infant delivered between 28 and 42 completed weeks, which was not possible with previous charts. |
| Databáze: | OpenAIRE |
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