[A case control study on the risk factors of male infertility].
OBJECTIVE
To study the risk factors of male infertility.


METHODS
Case control study including 94 cases and control group with a ratio of 1 to 1.


RESULTS
The risk factors of male infertility were long time heavy smoking habit (OR = 3.45, 95% CI: 1.95 - 6.10), illegal sexual intercourse (OR = 7.29, 95% CI: 2.54 - 20.89), growing vegetable under plastic in higher temperature (OR = 6.73, 95% CI: 1.91 - 23.69), contact with benzene chemicals (OR = 20.53, 95% CI: 4.67 - 90.25) and having Ureaplasma urealyticum (Uu) infection (OR = 5.55, 95% CI: 2.28 - 13.53).


CONCLUSIONS
Male infertility was resulted from many factors repeatedly acting on men for long time. In order to prevent male infertility, issues as environmental pollution, occupational protection need to be improved while bad working condition and risky behavior should be changed.
Qin
Kai-gui
KG
Affiliated Qingzhou Hospital of Weifang Medical College, Weifang 262500, China.
Hou
Yun-xia
YX
Zhang
Lan-ying
LY
Li
Ming-hong
MH
Yang
Shu-xia
SX
Ma
Yue
Y
D000328:Adult; D001554:Benzene / Q000633:toxicity*; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D004787:Environmental Pollution / Q000009:adverse effects*; D006801:Humans; D007248:Infertility, Male / Q000453:epidemiology* / Q000209:etiology; D008297:Male; D016273:Occupational Exposure / Q000009:adverse effects; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects; D016869:Ureaplasma Infections / Q000150:complications; D016990:Ureaplasma urealyticum
D001554:Benzene