Zhijiang Liang1, Peng Wang2, Qingguo Zhao3, Bei-Qi Wang2, Yuanzhu Ma4, Hualiang Lin5, Jianpeng Xiao6, Ji-Yuan Zhou7. 1. State Key Laboratory of Organ Failure Research, Ministry of Education, and Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Biostatistics, School of Public Health, Southern Medical University, Guangzhou 510515, China; Department of Public Health, Guangdong Women and Children Hospital, Guangzhou 511442, China. 2. State Key Laboratory of Organ Failure Research, Ministry of Education, and Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Biostatistics, School of Public Health, Southern Medical University, Guangzhou 510515, China. 3. Department of Epidemiology, Family Planning Research Institute of Guangdong Province, Guangzhou 510600, China. 4. Department of Public Health, Guangdong Women and Children Hospital, Guangzhou 511442, China. 5. Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China. 6. Department of Occupational Health and Occupational Medicine, School of Public Health, Southern Medical University, Guangzhou 510515, China. 7. State Key Laboratory of Organ Failure Research, Ministry of Education, and Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Biostatistics, School of Public Health, Southern Medical University, Guangzhou 510515, China. Electronic address: zhoujiyuan5460@hotmail.com.
Abstract
BACKGROUND: A few studies have reported that low temperatures were associated with an increased risk of preterm birth. However, the effect of extreme weather events, such as cold spell, on preterm birth has not been studied in China. OBJECTIVE: This study was conducted to evaluate the impact of the 2008 cold spell on preterm birth in two subtropical cities of Guangdong Province. METHODS: Data of daily preterm birth, air pollution and meteorological variables from 2006 to 2010 were collected in Dongguan and Shenzhen. A Poisson regression with a distributed lag nonlinear model was used to investigate the association between the 2008 cold spell and daily rate of preterm birth for each city. RESULTS: During the 2008 cold spell, total vaginal preterm births were increased by 22.44% and 21.25% in Dongguan and Shenzhen, respectively. The effect of the cold spell on preterm births lasted for more than 1 week, the lag0-6 days cumulative relative risk (RR) is 1.32 (95% CI: 1.10-1.58) and 1.40 (95% CI: 1.18-1.68) in Dongguan and Shenzhen, respectively. The effects were found to be more pronounced for the pregnant women with 34-36 gestation weeks, maternal age < 35 years group. CONCLUSION: This study demonstrates that cold spell could increase the risk of preterm births in Dongguan and Shenzhen, and the effect lasts for more than 1 week. Specific measures should be considered to protect the pregnant women, especially the vulnerable subgroups.
BACKGROUND: A few studies have reported that low temperatures were associated with an increased risk of preterm birth. However, the effect of extreme weather events, such as cold spell, on preterm birth has not been studied in China. OBJECTIVE: This study was conducted to evaluate the impact of the 2008 cold spell on preterm birth in two subtropical cities of Guangdong Province. METHODS: Data of daily preterm birth, air pollution and meteorological variables from 2006 to 2010 were collected in Dongguan and Shenzhen. A Poisson regression with a distributed lag nonlinear model was used to investigate the association between the 2008 cold spell and daily rate of preterm birth for each city. RESULTS: During the 2008 cold spell, total vaginal preterm births were increased by 22.44% and 21.25% in Dongguan and Shenzhen, respectively. The effect of the cold spell on preterm births lasted for more than 1 week, the lag0-6 days cumulative relative risk (RR) is 1.32 (95% CI: 1.10-1.58) and 1.40 (95% CI: 1.18-1.68) in Dongguan and Shenzhen, respectively. The effects were found to be more pronounced for the pregnant women with 34-36 gestation weeks, maternal age < 35 years group. CONCLUSION: This study demonstrates that cold spell could increase the risk of preterm births in Dongguan and Shenzhen, and the effect lasts for more than 1 week. Specific measures should be considered to protect the pregnant women, especially the vulnerable subgroups.
Authors: Huan Li; Min Li; Shiyu Zhang; Zhengmin Min Qian; Zilong Zhang; Kai Zhang; Chongjian Wang; Lauren D Arnold; Stephen Edward McMillin; Shaowei Wu; Fei Tian; Hualiang Lin Journal: Sci Total Environ Date: 2022-01-04 Impact factor: 7.963
Authors: Emily W Harville; Leslie Beitsch; Christopher K Uejio; Samendra Sherchan; Maureen Y Lichtveld Journal: Int J Disaster Risk Reduct Date: 2021-06-24 Impact factor: 4.842