■大多数评估精液质量可能的季节性变化的研究都认为温度是唯一的因果因素。
■为了评估精子质量的可能季节性以及精液参数与几个气象变量(温度,湿度,湿度表观温度和大气压)在大量男性患者中。
■这是一个回顾,横断面和相关/描述性研究。
■患者(n:15665)分为四组(夏季,冬天,春季和秋季)根据生育中心的援助日期。每日温度值,表观温度,湿度和大气压力由国家天气系统提供,并计算为精液收集前74天的平均值(生精周期)。
■酌情,结果通过方差分析/Kruskal-Wallis,卡方检验,t检验/Mann-Whitney,正向条件回归模型和Spearman/Pearson相关性。
■我们检测到季节性对精子数量的影响,精子总数和活动精子总数,冬季最高,夏季最低。相关分析表明,表观温度和湿度与精液参数呈负相关,湿度是最强大的预测气象变量。
■精子质量受季节影响;环境温度和湿度的增加会对精液质量产生负面影响。
UNASSIGNED: Most studies evaluating the possible seasonal variation of semen quality have considered temperature as the only causal factor.
UNASSIGNED: To assess possible seasonality in sperm quality and associations between semen parameters and several meteorological variables (temperature, humidity, apparent temperature and atmospheric pressure) in a large cohort of andrological patients.
UNASSIGNED: This was a retrospective, cross-sectional and correlational/descriptive study.
UNASSIGNED: Patients (n: 15665) were categorised into four groups (summer, winter, spring and autumn) according to the date of assistance at the fertility centre. Daily values of temperature, apparent temperature, humidity and atmospheric pressure were provided by the National Weather System and were calculated as the average of the 74 days previous to semen collection (spermatogenic cycle).
UNASSIGNED: As appropriate, the results were analysed by analysis of variance/Kruskal-Wallis, Chi-square test, t-test/Mann-Whitney, forward conditional regression model and Spearman/Pearson\'s correlations.
UNASSIGNED: We detected seasonality effects on sperm count, total sperm count and total motile sperm count, with the highest values in winter and the lowest in summer. Correlation analysis showed that temperature, apparent temperature and humidity negatively correlated with semen parameters, being humidity the most powerful predictive meteorological variable.
UNASSIGNED: Sperm quality is influenced by seasons; increased environmental temperature and humidity negatively affect semen quality.