Ambient sulfur dioxide could have an impact on testicular volume from a observational study on a population of infertile male

Table 4 Multivariable linear regression by using sex hormone for exposure to ambient pollutants

Sex hormone	Regression coefficients (95% confidence interval)	p value
FSH
PM2.5	0.073 (−0.651 to 0.931)	0.704
SO₂	0.262 (−2.613 to 7.24)	0.324
NOx	−0.431 (−0.218 to 0.004)	0.057
O₃	0.122 (−0.503 to 0.852)	0.582
Age	1.053 (0.290 to 0.639)	< 0.01^**
LH
PM2.5	0.014 (−0.357 to 0.371)	0.966
SO₂	0.170 (−1.857 to 2.680)	0.697
NOx	0.276 (−0.032 to 0.070)	0.436
O₃	0.559 (−0.093 to 0.531)	0.150
Testosterone
PM2.5	0.052 (−0.50 to 0.576)	0.880
SO₂	−0.376 (−4.572 to 2.042)	0.421
NOx	0.156 (−0.061 to 0.090)	0.678
O₃	−0.044 (− 0.469 to 0.424)	0.914

Abbreviations: FSH Follicle Stimulating Hormone, LH Luteinizing hormone, **p < 0.01

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