Table 1 Basic characteristics of subjects, sperm parameters, and virological semen analyses

Age (years)

34.9 (26.7–43.1)

26.7 (24.0–34.8)

0.039^a

Body mass index (kg/m²)

24.1 (23.1–26.9)

23.9 (22.3–26.1)

0.977^a

Smokers

4 (16.0%)

5 (41.7%)

0.088^c

Diabetes mellitus type 2

0

0

Hypertension in need of medical treatment

1

0

Paternity

6 (24.0%)

2 (16.7%)

0.612^c

Result of fertility treatment

1 (4.0%)

1 (8.3%)

 > 0.999^d

Testicular cancer

1 (4.0%)

1 (8.3%)

 > 0.999^d

Semen volume (ml)

2.8 (2.0–3.9)

3.9 (2.2–5.0)

0.131^b

Sperm concentration (10⁶/ml)

44.0 (23.0–82.0)

93.5 (23.5–100.0)

0.140^b

Total sperm number (10⁶/ejaculate)

136.8 (54.0–228.1)

204.9 (83.1–550.0)

0.153^b

Progressive motility (%)

25.0 (13.5–35.0)

20.0 (10.0–41.3)

0.708^b

Total motility (%)

40.0 (18.5–40.0)

25.0 (15.0–47.5)

0.658^b

Normozoospermia (n)

10 (40%)

5 (41.7%)

0.923^c

Time of abstinence (days)

4 (3.0–6.5)

3.5 (2.3–4.0)

0.204^b

SARS CoV-2-positive PCR of ejaculates (n)

0

0

SARS-CoV-2-positive cell cultures of ejaculates (n)

0

0