Table 3.
Mean sperm parameters across tertiles of PDI, hPDI, and uPDI scores
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| Variable | PDI | hPDI | uPDI | |||||||||
| T1 (n=96) | T2 (n=76) | T3 (n=82) | P value | T1 (n=85) | T2 (n=89) | T3 (n=80) | P value | T1 (n=90) | T2 (n=83) | T3 (n=81) | P value | |
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| Volume (ml) | ||||||||||||
| Model Ia | 4.19 ± 2.23d | 3.97 ± 1.92 | 4.31 ± 2.04 | 0.57 | 4.17 ± 2.18 | 3.82 ± 1.65 | 4.54 ± 2.33 | 0.07 | 4.21 ± 2.05 | 4.13 ± 1.80 | 4.14 ± 2.37 | 0.96 |
| Model IIb | 4.19 ± 2.23 | 3.97 ± 1.92 | 4.31 ± 2.04 | 0.56 | 4.17 ± 2.18 | 3.82 ± 1.65 | 4.54 ± 2.33 | 0.14 | 4.21 ± 2.05 | 4.13 ± 1.80 | 4.14 ± 2.37 | 0.96 |
| Model IIIc | 4.19 ± 2.23 | 3.97 ± 1.92 | 4.31 ± 2.04 | 0.59 | 4.17 ± 2.18 | 3.82 ± 1.65 | 4.54 ± 2.33 | 0.13 | 4.21 ± 2.05 | 4.13 ± 1.80 | 4.14 ± 2.37 | 0.93 |
| Density (×106/ml) | ||||||||||||
| Model Ia | 10.83 ± 10.75 | 15.54 ± 17.51 | 13.32 ± 18.55 | 0.14 | 9.35 ± 6.93 | 15.58 ± 19.22 | 14.15 ± 17.59 | 0.02* | 11.96 ± 13.18 | 13.36 ± 15.24 | 13.93 ± 18.75 | 0.70 |
| Model IIb | 10.83 ± 10.75 | 15.54 ± 17.51 | 13.32 ± 18.55 | 0.11 | 9.35 ± 6.93 | 15.58 ± 19.22 | 14.15 ± 17.59 | 0.02* | 11.96 ± 13.18 | 13.36 ± 15.24 | 13.93 ± 18.75 | 0.69 |
| Model IIIc | 10.83 ± 10.75 | 15.54 ± 17.51 | 13.32 ± 18.55 | 0.07 | 9.35 ± 6.93 | 15.58 ± 19.22 | 14.15 ± 17.59 | 0.03* | 11.96 ± 13.18 | 13.36 ± 15.24 | 13.93 ± 18.75 | 0.93 |
| Total motility (%) | ||||||||||||
| Model Ia | 28.38 ± 17.99 | 31.68 ± 18.91 | 28.51 ± 17.52 | 0.43 | 26.60 ± 16.22 | 31.74 ± 19.72 | 29.81 ± 17.97 | 0.16 | 25.65 ± 16.74 | 28.09 ± 19.33 | 34.94 ± 17.14 | 0.002* |
| Model IIb | 28.38 ± 17.99 | 31.68 ± 18.91 | 28.51 ± 17.52 | 0.43 | 26.60 ± 16.22 | 31.74 ± 19.72 | 29.81 ± 17.97 | 0.19 | 25.65 ± 16.74 | 28.09 ± 19.33 | 34.94 ± 17.14 | 0.002* |
| Model IIIc | 28.38 ± 17.99 | 31.68 ± 18.91 | 28.51 ± 17.52 | 0.36 | 26.60 ± 16.22 | 31.74 ± 19.72 | 29.81 ± 17.97 | 0.19 | 25.65 ± 16.74 | 28.09 ± 19.33 | 34.94 ± 17.14 | 0.009* |
| Normal morphology (%) | ||||||||||||
| Model Ia | 3.47 ± 8.29 | 4.67 ± 11.54 | 4.14 ± 10.65 | 0.74 | 3.85 ± 9.98 | 4.24 ± 9.92 | 4.03 ± 10.52 | 0.96 | 4.27 ± 10.64 | 3.34 ± 7.40 | 4.51 ± 11.80 | 0.73 |
| Model IIb | 3.47 ± 8.29 | 4.67 ± 11.54 | 4.14 ± 10.65 | 0.87 | 3.85 ± 9.98 | 4.24 ± 9.92 | 4.03 ± 10.52 | 0.98 | 4.27 ± 10.64 | 3.34 ± 7.40 | 4.51 ± 11.80 | 0.67 |
| Model IIIc | 3.47 ± 8.29 | 4.67 ± 11.54 | 4.14 ± 10.65 | 0.91 | 3.85 ± 9.98 | 4.24 ± 9.92 | 4.03 ± 10.52 | 0.96 | 4.27 ± 10.64 | 3.34 ± 7.40 | 4.51 ± 11.80 | 0.67 |
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Data are presented as mean ± SE. a; Crude, b; Adjusted for age and energy intake, c; Additionally adjusted for BMI, physical activity, marriage time, educational status, smoking and alcohol history, d; These values are mean (SE), T1; First tertile, T2; Second tertile, T3; Third tertile, and *; P˂0.05 was considered as significant (more explanation are reported in result section).