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

Table 6 Multivariable linear regression by using the testicular volume for exposure of ambient pollutant after adjusting for sex hormone

	Regression coefficients (95% confidence interval)	p value
Right testicle
PM2.5	0.147 (−0.492 to 1.031)	0.476
SO₂	−0.520 (−4.696 to − 0.0474)	0.018*
NOx	0.170 (−0.067 to 0.155)	0.424
O₃	−0.188 (− 0.834 to 0.317)	0.366
Left testicle
PM2.5	0.141 (−0.465 to 0.929)	0.502
SO₂	−0.506 (−4.193 to − 0.328)	0.023*
NOx	0.199 (−0.055 to 0.147)	0.362
O₃	−0.009 (− 0.538 to 0.516)	0.967

ISSN: 1471-2490