Division of Urology, ABC Medical School, São Paulo, Brazil.
Int Braz J Urol. 2012 Mar-Apr;38(2):222-8; discussion 228-9. doi: 10.1590/s1677-55382012000200010.
The hypothesis of association between testicular torsion and hyperactive cremasteric reflex, worsened by cold weather, has not been proved. Thirteen studies in the literature evaluated this issue, with inconclusive results. The aim of the present study was to evaluate the seasonality of testicular torsion in a large subset of patients surgically treated in Brazil, and additionally to estimate the incidence of testicular torsion.
Brazilian Public Health System Database was assessed from 1992-2010 to evaluate hospital admissions associated with treatment of testicular torsion. Average monthly temperature between 1992-2010 was calculated for each region.
We identified 21,289 hospital admissions for treatment of testicular torsion. There was a higher number of testicular torsions during colder months (p = 0.002). To estimate the incidence of testicular torsion, we have related our findings to data from the last Brazilian census (2010). In 2010, testicular torsion occurred in 1.4:100,000 men in Brazil.
Testicular torsion occurred at an annual incidence of approximately 1.4:100,000 men in Brazil in 2010. Seasonal variations do occur, with a significant increase of events during winter. Our findings support the theory of etiological role of cold weather to the occurrence of testicular torsion. Strategies to prevent these events can be based on these findings.
睾丸扭转与提睾反射亢进之间的关联假说，在寒冷天气下会加重，这一假说尚未得到证实。文献中有 13 项研究评估了这个问题，但结果并不一致。本研究的目的是评估巴西大量接受手术治疗的患者中睾丸扭转的季节性，并估算睾丸扭转的发病率。
评估了 1992 年至 2010 年巴西公共卫生系统数据库，以评估与睾丸扭转治疗相关的住院情况。计算了 1992-2010 年期间每个地区的平均每月温度。
我们确定了 21289 例因治疗睾丸扭转而住院的病例。在较冷的月份，睾丸扭转的数量更多（p = 0.002）。为了估算睾丸扭转的发病率，我们将研究结果与 2010 年巴西最后一次人口普查的数据相关联。2010 年，巴西每 10 万人中就有 1.4 人发生睾丸扭转。
2010 年，巴西每年约有 1.4/10 万男性发生睾丸扭转。确实存在季节性变化，冬季发生的事件显著增加。我们的研究结果支持寒冷天气对睾丸扭转发生的病因学作用的理论。可以根据这些发现制定预防这些事件的策略。
