Table 3.
Semen quality of the entire study group young men (‘all men’) from the Turku area in Finland, and a subgroup of these without previous or current conditions that potentially could affect the semen quality
| Adjusted median (95% CI) for investigation periods | |||
|---|---|---|---|
| 1998–99 | 2001–03 | 2006 | |
| Semen volume (mL): | |||
| All men | 3.4 (3.1–3.7) | 3.4 (3.1–3.6) | 3.3 (3.0–3.7) |
| Subgroup | 3.4 (3.0–3.7) | 3.4 (3.1–3.8) | 3.4 (3.0–3.9) |
| Sperm concentration (million/mL): | |||
| All men | 67 (57–80) | 60 (51–71) | 48 (39–60) |
| Subgroup | 65 (52–819 | 58 (47–72) | 48 (36–64) |
| Total sperm count (million): | |||
| All men | 228 (190–274) | 201 (169–238) | 165 (132–207) |
| Subgroup | 218 (173–275) | 200 (160–249) | 172 (128–231) |
| Normal morphology (%): | |||
| All men | 9.8 (9.2–10.4) | 9.1 (8.5–9.7) | 8.6 (7.6–9.5) |
| Subgroup | 9.8 (9.0–10.6) | 9.0 (8.3–9.7) | 8.9 (7.6–10.1) |
| Total normal spermatozoa (million): | |||
| All men | 18 (14–23) | 15 (12–19) | 11 (8–15) |
| Subgroup | 18 (14–25) | 15 (11–20) | 13 (9–20) |
| Motile (%): | |||
| All men | 65 (63–66) | 74 (72–75) | 73 (71–74) |
| Subgroup | 65 (63–67) | 74 (72–76) | 73 (71–76) |
For definition of the subgroup, see Table 1.
Adjusted median and 95% CI (confidence interval) calculated by linear regression analysis.
Sperm concentration, total sperm and semen volume adjusted to a period of ejaculation of 95 h for a 19-year-old man. Motility and morphology were also adjusted to represent a 19-year-old man. See text for further details.