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Table 3 Coefficients from linear regression for PM2.5 exposure in relation to semen parameters by exposure period (0 - 90, 0 - 9, 10 - 14, 15 - 69, 70 - 90 days) prior to semen collection in all participants (n = 1554) expressed as change in the parameter for a 10 μg/m3 increase in exposure

From: Association between ambient particulate matter exposure and semen quality in fertile men

Semen parametera

0-90 days

0-9 days

10-14 days

15-69 days

70-90 days

Coefficient (×10; 95% CI)

Pb

Coefficient (×10; 95% CI)

Pb, c

Coefficient (×10; 95% CI)

Pb, d

Coefficient (× 10; 95% CI)

Pb, e

Coefficient (×10; 95% CI)

Pb, f

Semen volume (ml)

−0.003 (−0.025, 0.018)

0.965

−0.004 (−0.018, 0.010)

0.980

0.002 (−0.013, 0.010)

0.975

−0.002 (−0.023, 0.019)

0.851

0.009 (−0.007, 0.025)

0.324

Concentration (106/ml)

0.178 (−1.342, 1.698)

0.965

−0.127 (−1.105, 0.802)

0.980

−0.333 (−1.136, 0.471)

0.975

1.363 (−0.142, 2.868)

0.152

−0.496 (−1.625, 0.633)

0.419

Total sperm number (106)

0.001 (−0.039, 0.041)

0.965

−0.004 (−0.030, 0.022)

0.980

−0.011 (−0.032, 0.011)

0.975

0.025 (−0.015, 0.065)

0.372

0.003 (−0.033, 0.027)

0.834

Total motility (%)

−2.211 (−3.121, −1.301)

<  0.001

−0.194 (−0.782, 0.394)

0.980

−0.216 (−0.698, 0.267)

0.975

−0.981 (−1.886, −0.077)

0.094

−0.770 (−1.451, −0.090)

0.075

Progressive motility (%)

−1.925 (−2.720, −1.131)

<  0.001

−0.135 (−0.650, 0.380)

0.980

−0.090 (−0.512, 0.332)

0.975

−0.893 (−1.685, −0.102)

0.094

−0.828 (−1.421, −0.234)

0.029

VCL (μm/s)

−1.054 (−1.467, −0.640)

<  0.001

−0.202 (−0.470, 0.066)

0.841

−0.011 (−0.208, 0.231)

0.989

−0.714 (−1.125, −0.302)

0.009

−0.306 (−0.613, −0.001)

0.089

VSL (μm/s)

−0.022 (−0.032, −0.011)

<  0.001

−0.005 (−0.011, −0.002)

0.841

−0.001 (−0.006, 0.005)

0.975

−0.014 (−0.025, −0.004)

0.038

−0.013 (−0.021, −0.006)

0.004

VAP (μm/s)

−0.714 (−1.000, −0.428)

<  0.001

−0.165 (−0.350, 0.020)

0.841

−0.016 (−0.135, 0.168)

0.975

−0.469 (−0.752, −0.185)

0.009

−0.389 (−0.598, −0.371)

0.004

BCF (Hz)

0.0004 (−0.003, 0.010)

0.510

−0.0004 (−0.004, 0.004)

0.980

−0.001 (−0.004, 0.002)

0.975

0.003 (−0.004, 0.009)

0.620

0.006 (0.002, 0.011)

0.031

ALH (μm/s)

−0.023 (−0.037, −0.008)

0.005

0.004 (−0.005, 0.014)

0.980

0.0001 (−0.008, 0.008)

0.989

−0.014 (−0.029, 0.0001)

0.112

−0.006 (−0.017, 0.004)

0.312

LIN (%)

−0.018 (−0.377, 0.340)

0.965

−0.003 (−0.235, 0.229)

0.980

0.071 (−0.119, 0.262)

0.975

−0.071 (−0.428, 0.285)

0.851

−0.264 (−0.528, −0.0002)

0.089

STR (%)

−0.001 (−0.003, 0.002)

0.965

0.00002 (−0.002, 0.002)

0.980

0.001 (−0.0004, 0.002)

0.975

0.0003 (−0.003, 0.002)

0.851

−0.002 (−0.004, −0.0001)

0.086

WOB (%)

−0.005 (−0.301, 0.310)

0.965

−0.009 (−0.207, 0.189)

0.980

0.019 (−0.143, 0.181)

0.975

−0.035 (−0.338, 0.268)

0.851

−0.217 (−0.443, −0.008)

0.091

MAD (°)

0.004 (−0.009, 0.010)

0.965

−0.002 (−0.008, 0.005)

0.980

−0.002 (−0.007, 0.003)

0.975

0.001 (−0.008, 0.011)

0.851

0.006 (−0.002, 0.013)

0.174

  1. aALH amplitude of lateral head displacement, BCF beat cross frequency, LIN linearity, MAD mean angular displacement, PM2.5 particulate matter with aerodynamic less than 2.5 μm, CI confidence interval, STR straightness, VAP average path velocity, VCL curvilinear velocity, VSL straight line velocity, WOB curvilinear path wobble
  2. bResults were adjusted for age, BMI, ethnicity, education, smoking status, drinking status, family income, abstinence period, season, and temperature. P value for adjusting FDR using the Benjamini & Hochberg procedure
  3. cAmbient particulate matter exposure of 10-14 days, 15-69 days, 70-90 days were also adjusted
  4. dAmbient particulate matter exposure of 0-9 days, 15-69 days, 79-90 days were also adjusted
  5. eAmbient particulate matter exposure of 0-9 days, 10-14 days, 70-90 days was also adjusted
  6. fAmbient particulate matter exposure of 0-9 days, 10-14 days, 15-69 days was also adjusted
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Environmental Health

ISSN: 1476-069X