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Table 1 Subject demographics and distribution of semen parameters (Mean ± SD)

From: Environmental exposure to arsenic may reduce human semen quality: associations derived from a Chinese cross-sectional study

 

Number (%)

Mean ± SD

All

96 (100)

 

Age (years)

 

32 ± 4.8

BMI (kg m-2)

 

23.5 ± 3.27

Creatinine (g L-1)

 

0.98 ± 0.60

Smoking status

  

 Smoker

38 (40)

 

 Non-smoker

58 (60)

 

Alcohol drinking status

  

 Drinker

57 (59)

 

 Non-drinker

39 (41)

 

Education status

  

 >high school

54 (56)

 

 ≤high school

42 (44)

 

Semen parameters a

  

 Sperm concentration (million mL-1)b

 

72.3 ± 48.6

  Subjects <20 million mL-1

13 (14)

 

 Sperm motility

 

63.6% ± 19.4%

  Subjects <50% motile sperm

24 (25)

 

 Semen volume (mL)

 

2.74 ± 0.88

  Subjects <2 mL

13 (14)

 

 Normal sperm morphology rate

 

16.6% ± 8.8%

  Subjects <15%

45(47)

 

Abstinence time

  

 2 days

9 (9)

 

 3 days

22 (23)

 

 4 days

15 (16)

 

 5 days

24 (25)

 

 ≥6 days

26 (27)

 
  1. a WHO guidelines for sperm concentration, motility, volume and sperm morphology are sperm concentration ≥20×106/mL, motility ≥50% motile, semen volume ≥2 mL, and Normal sperm morphology rate ≥15%.
  2. b sperm concentration, sperm motility and normal sperm morphology rate are non-normally distributed. The medians are 66.6, 68.8% and 15.2%, and the 95% percentiles are 62.5 ~ 82.2, 59.7% ~ 67.5% and 14.7 ~ 18.4%, respectively.