Yueh Yea Lo, Juliana Othman
Lecturers' readiness for EMI in Malaysia higher education
PloS one
objective evaluate association longterm exposure ambient ozone o3 sperm quality methods january 1 2014 december 31 2019 healthy sperm donors recruited human sperm bank shandong university affiliated reproductive hospital total 37 977 sperm donation data 2 971 healthy volunteers analyzed average annual o3 concentration 001 001 matched according household address multivariate mixedeffect model used analyze exposureresponse relationship average o3 exposure concentration sperm quality previous year donor random intercept results presented changes 95 confidence intervals cis sperm parameters associated 10 gm3 increases o3 effects individual characteristics association o3 sperm quality evaluated stratified analysis results average o3 concentration year semen collection 10709750 gm3 10 gm3 increase o3 associated declined sperm concentration 312 95ci455 167 total sperm count 521 95ci728 309 total sperm motility 149 95ci237 061 progressive motility 253 95ci378 126 total motile sperm count 582 95ci817 341 progressively motile sperm count 622 95ci873 364 men aged 30 obese lower education levels might susceptible influence o3 sperm quality difference statistically significant p005 conclusion longterm exposure o3 shandong province associated decrease sperm quality