Table 2.
Sperm DFI, volume, concentration, total count, motility, and TPMSC among different age groups
| Age | Number (%) | Age (years) | Sperm DFI (%)# | Semen volume (ml) # | Sperm concentration (× 106/ml) | Total sperm count (× 106)* | Progressive motility (%) ◊ | Total motile sperm count (× 106)◊ |
|---|---|---|---|---|---|---|---|---|
| 20–29 years | 1, 319 (25.8) | 27.5±1.6/28.0 | 16.1±9.6/13.8 | 3.0±1.3/2.8 | 60.2±40.2/51.8 | 169.7±124.0/141.8 | 40.6±11.5/41.0 | 71.2±54.5/58.6 |
| 30–39 years | 2, 877 (56.3) | 33.5±2.7/33.0 | 18.7±11.4/15.7 | 2.8±1.3/2.8 | 61.3±42.5/51.8 | 164.8±125.2/135.0 | 38.9±11.4/39.2 | 67.0±55.1/54.2 |
| 40–49 years | 831 (16.3) | 42.9±2.5/42.0 | 24.1±13.0/21.1 | 2.6±1.2/2.6 | 64.6±45.1/55.7 | 158.2±131.7/121.4 | 36.2±11.4/36.7 | 60.6±54.4/46.5 |
| ≥ 50 years | 87 (1.7) | 53.1±3.4/52.0 | 30.2±15.7/26.8 | 2.2±1.5/1.9 | 69.7±46.7/59.4 | 134.9±95.9/ 122.0 | 32.2±14.7/32.4 | 46.8±38.7/39.2 |
| p value | - | - | 0.000 | 0.000 | 0.186 | 0.003 | 0.000 | 0.000 |
Data presented as mean ± standard deviation/median or n (%) unless otherwise noted
TPMSC: total progressive motile sperm count
#Pairwise comparisons of sperm DFI and semen volume categorized by age revealed a significant difference between every two groups (p < 0.05 or p < 0.001)
*Total sperm count of 40–49 age group was significantly lower than 20–29 age group (p = 0.008) and no other significant difference was observed
◊Progressive motility and TPMSC showed a significant difference between every two groups (p < 0.05 or p < 0.001) with the exception of the two oldest groups, i.e., 40 ~ 49 and ≥ 50 group