Table 3 Bivariate associations between sperm parameters and IVF outcomes
Variable | Beta coefficient /R2 | |
|---|---|---|
Fertilization (%) (CI 95% β)a | Viable embryos (%) (CI 95% β)a | |
WHO parameters | ||
 Volume (ml) | 0.86 / 0.003 (− 3.09, 4.81) | −2.55 / 0.010 (− 8.67, 3.56) |
 Concentration (× 106/ml) | − 0.02 / 0.000 (− 0.10, 0.11) | 0.09 / 0.020 (− 0.07, 0.26) |
 Total count (× 106) | 0.00 / 0.003 (− 0.02, 0.03) | − 0.04 / 0.000 (− 0.03, 0.04) |
 Motility (%) | 3.19 / 0.000 (− 0.31, 0.37) | − 0.13 / 0.003 (− 0.66, 0.40) |
 Morphology (%) | 3.56 / 0.054 (0.05, 7.18) * | −2.75 / 0.013 (− 8.48, 2.98) |
 Viability (%) | 0.20 / 0.012 (− 0.24, 0.66) | − 0.20 / 0.004 (− 0.90, 0.50) |
 pH | − 0.92 / 0.000 (− 9.29,7.44) | −5.79 / 0.011 (− 18.71, 7.12) |
 Leukocytes (× 106/ml) | − 3.93 / 0.015 (− 11.66, 3.80) | −9.35 / 0.035 (− 21.23, 2.52) |
Sperm quality and function parameters (%) | ||
 sAR | −5.92 / 0.276 (− 8.26, − 3.58) *** | − 4.19 / 0.057 (− 8.33, − 0.04) * |
 iAR | 1.83 / 0.150 (0.76, 2.89) *** | −0.87 / 0.014 (− 0.90, 2.65) |
 ARIC | 2.10 / 0.270 (1.26, 2.94) *** | −0.18 / 0.035 (− 0.32, 2.68) |
 DFI | 0.18 / 0.003 (− 0.59, 0.96) | −1.77 / 0.127 (− 2.91, − 0.64) ** |
 HDS | −0.65 / 0.013 (− 2.02, 0.72) | −0.52 / 0.003 (− 2.66, 1.61) |