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Table 3 Multivariate analysis for semen quality characteristics of fresh and frozen-thawed semen and elements Fe, Se and Zn measured in seminal plasma on the day of collection

From: Macro- and microelements in serum and seminal plasma as biomarkers for bull sperm cryotolerance

Variables Elements in seminal plasma (mg/L)
Fe Se Zn
Semen characteristics (%) β (95% CI) P β (95% CI) P β (95% CI) P
Fresh semen
 Motilitya 1,30,610 (38,101–2,23,118) 0.0075 −1,26,431 (−1,164,930 to 9,12,069) 0.8044 61,517 (−58,790 to 1,81,823) 0.3029
 Progressive motilitya 1,19,776 (56,976–1,82,575) 0.0006 −77,622 (−7,82,609 to 6,27,364) 0.8227 42,553 (−39,118–1,24,223) 0.2940
 Acrosome defectsb −0.4749 (−0.8642 to −0.0855) 0.0188 2.3681 (−2.0026 to 6.7388) 0.2756 −2.0780 (−1.0140 to −0.0013) 0.0494
 DNA fragmentation −1.6851 (−3.1603 to −0.2099) 0.0268 −1.9652 (−18.5260 to 14.5956) 0.8092 −1.3558 (−3.2743 to 0.5627) 0.1583
Frozen-thawed semen
 Viabilitya 1,14,891 (24,909–2,04,872) 0.0143 −1,56,982 (−1,167,111 to 8,53,146) 0.7519 72,103 (−44,917 to 1,89,124) 0.2165
 DNA fragmentation −3.4984 (−5.7577 to −1.2391) 0.0038 −5.7146 (−31.0774 to 19.6481) 0.6471 −1.0197 (−3.9579 to 1.9185) 0.4820
  1. aCubic transformation
  2. bLog transformation