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Ma Y, He Y, Tang D, Cai G, Fan D, Cao Y, Pan F. Association between diurnal temperature range and sperm quality: Evidence from a prospective cohort in Central China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169761. [PMID: 38171276 DOI: 10.1016/j.scitotenv.2023.169761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 12/23/2023] [Accepted: 12/27/2023] [Indexed: 01/05/2024]
Abstract
Inter-day temperature variability has been reported to be associated with sperm quality in a city-level exposure assessment study. However, studies exploring the impact of temperature variability within a single day on sperm quality at individual level are still lacking. The present study aims to bridge this research gap by analyzing the linear and non-linear associations between diurnal temperature range (DTR) exposure and sperm quality, utilizing data from the Anhui Prospective Assisted Reproduction Cohort. The study included 15,112 males (totaling 28,267 tests) and assessed individual exposure to various environmental factors (residential greenness, ambient particulate matter, sulfur dioxide, relative humidity, ambient temperature, and DTR) during the 0-90 day period before semen analysis. A combination of a linear mixed model, natural cubic splines, and subgroup analysis was employed. Significant "U"-shaped non-linear associations were observed between DTR exposure and total motility, sperm concentration, sperm count, total motile sperm count, and progressive motile sperm count. Lower DTR levels negatively impacted these parameters, whereas higher DTR levels showed a positive effect. Notably, these associations were more pronounced at ambient temperatures below 16.5 °C, while absent in warmer conditions. Sperm quality demonstrates increased sensitivity to DTR exposure in cooler environments. Therefore, implementing effective individual temperature management strategies is crucial for mitigating decreased sperm quality associated with DTR exposure, highlighting the potential benefits of government policies aimed at achieving carbon neutrality to enhance overall sperm quality in the general population.
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Affiliation(s)
- Yubo Ma
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China; The Key Laboratory of Major Autoimmune Diseases, 81 Meishan Road, Anhui Medical University, Hefei, Anhui, China
| | - Ye He
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China; Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Dongdong Tang
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China; Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Guoqi Cai
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China; The Key Laboratory of Major Autoimmune Diseases, 81 Meishan Road, Anhui Medical University, Hefei, Anhui, China
| | - Dazhi Fan
- Foshan Institute of Fetal Medicine, Southern Medical University Affiliated Maternal and Child Health Hospital of Foshan, Foshan, Guangdong, China
| | - Yunxia Cao
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China; Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei, China.
| | - Faming Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China; The Key Laboratory of Major Autoimmune Diseases, 81 Meishan Road, Anhui Medical University, Hefei, Anhui, China.
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Amoatey P, Osborne NJ, Darssan D, Xu Z, Doan QV, Phung D. The effects of diurnal temperature range on mortality and emergency department presentations in Victoria state of Australia: A time-series analysis. ENVIRONMENTAL RESEARCH 2024; 240:117397. [PMID: 37879389 DOI: 10.1016/j.envres.2023.117397] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/30/2023] [Accepted: 10/11/2023] [Indexed: 10/27/2023]
Abstract
State of Victoria, Australia (SVA) has a wide variation of diurnal temperatures (DTR). DTR has been reported to be associated with risk of mortality and morbidity. We examined the association between exposure to DTR and risk of all-cause mortality and emergency department (ED) presentations in the SVA. We obtained data on daily counts of deaths and ED presentations, and weather data from 1 st January 2000─2019. We applied a quasi-Poisson time-series regression analysis to examine the association between daily DTR exposures and risk of mortality and ED presentations. The analyses were queried by age, sex, seasons, ED presentations triages, and departure status. Risk of mortality and ED presentation increased by 0.33% (95% CI: 0.24%-0.43%), and 0.094% (95% CI: 0.077%-0.11%) in relation to one degree increase in the daily DTR. The association between DTR and ED presentations was stronger in children (0-15 years) (0.38% [95% CI: 0.34%-0.42%]) and the elderly (75+ years) (0.34% [95% CI: 0.29%-0.39%]). Resuscitation, which was consistently accounted for the highest vulnerability to DTR variation, increased by 0.79% (95% CI: 0.60%-0.99%). This study suggests that the risk of mortality and ED presentations associates with the increase of DTR. Children, the elderly, and their caregivers need to be made aware of the health risk posed by DTR.
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Affiliation(s)
- Patrick Amoatey
- School of Public Health, Faculty of Medicine, The University of Queensland, Australia
| | - Nicholas J Osborne
- School of Public Health, Faculty of Medicine, The University of Queensland, Australia; School of Population Health, University of New South Wales, Sydney, NSW 2052, Australia; European Centre for Environment and Human Health (ECEHH), University of Exeter Medical School, Knowledge Spa, Royal Cornwall Hospital, Truro TR1 3HD, Cornwall, UK; Queensland Alliance for Environmental Health Sciences, The University of Queensland, Australia
| | - Darsy Darssan
- School of Public Health, Faculty of Medicine, The University of Queensland, Australia
| | - Zhiwei Xu
- School of Medicine and Dentistry, Griffith University, Australia
| | - Quang-Van Doan
- Center for Computational Sciences, University of Tsukuba, Japan
| | - Dung Phung
- School of Public Health, Faculty of Medicine, The University of Queensland, Australia; Queensland Alliance for Environmental Health Sciences, The University of Queensland, Australia.
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