| Table 3. Comparison of continuous confounding variables between the two study groups. | ||||
| FRESH SPERM (N=266) |
FROZEN SPERM (N=203) |
p | ||
|---|---|---|---|---|
| CYCLES | 266 | 203 | ||
| FEMALE CHARACTERISTICS | Age (years old) | 41.43 (40.96-41.90) |
41.39 (40.82-41.96) |
0.916 |
| BMI (kg/m2) | 22.89 (22.54-23.25) |
23.03 (22.62-23.45) |
0.609 | |
| Oocyte age (years) | 26.98 (26.0-27.90) |
26.03 (25,17-26.90) |
0.147 | |
| MALE CHARACTERISTICS | Age (years old) | 42.35 (41.55-43.15) |
42.40 (41,53-43.27) |
0.935 |
| BMI (kg/m2) | 26.63 (26.19-27.08) |
25.95 (25.49-26.41) |
0.040 | |
| SEMINAL CHARACTERISTICS | Fresh seminal volume (ml) | 3.25 (2.84-3.66) |
0.96 (0.91-1.02) |
0.000 |
| Fresh seminal concentration (mill/ml) | 51.60 (46.92-56.28) |
70.11 (62.18-78.04) |
0.000 | |
| Fresh progressive spermatozoa (%) | 42.66 (40.28-45.04) |
19.17 (17.69-20.65) |
0.000 | |
| Seminal volume capacitated (ml) | 0.22 (0.20-0.26) |
0.14 (0.12-0.16) |
0.000 | |
| Concentration post work up (mill/ml) | 1.97 (0.97-2.98) |
1.74 (0.39-3.10) |
0.784 | |
| Progressive spermatozoa post work up (%) | 94.32 (91.98-96.67) |
94.05 (91.63-96.47) |
0.875 | |
| OOCYTE CHARACTERISTICS | Nº of oocytes recovered/cycle | 13.06 (12.82-13.31) |
12.91 (12.66-13.16) |
0.384 |
| Nº of oocytes MII/cycle | 11.49 (11.07-11.91) |
11.92 (11.56-12.29) |
0.143 | |
| Nº of oocytes inseminated/cycle | 12.45 (12.21-12.68) |
12.21 (11.95-12.47) |
0.190 | |
| Nº of oocytes fertilized/cycle | 9.48 (9.20-9.77) |
9.37 (9.08-9.67) |
0.602 | |
| Fertilization rate (%) | 76.12 (74.39-77.86) |
77.03 (75.07-78.99) |
0.497 | |
*Results are presented as mean (95% CI). The significance level has been considered to be 5%, so p value<0.05 is considered significant.