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Table 1 Characteristics of the study population men (n = 75)

From: Environmental exposure to pyrethroids and sperm sex chromosome disomy: a cross-sectional study

Variable Mean ± SD
Age 35.3 ± 5.1
BMI (kg/m2) 27.9 ± 4.8
Semen concentration (in millions/mL) 110.1 ± 104.8
Semen motility (%) 54.2 ± 22.2
Semen morphology (% normal) 8.5 ± 3.8
Race (n = 2 missing) N (%)
White 66 (90.4)
Black 2 (2.7)
Other 5 (6.9)
Hispanic ethnicity  
No 72 (96.0)
Yes 3 (4.0)
Semen concentration  
<20 million/mL 8 (11.0)
Semen morphology  
<4% normal 5 (7.0)
Semen motility  
<50% motile 32 (42.7)
Abstinence time  
< = 2 days 19 (25.3)
3-4 days 36 (48.0)
> = 5 days 20 (26.7)
Smoking (n = 2 missing)  
No 56 (76.7)
Current smoker 3 (4.1)
Former smoker 14 (19.2)
  1. SD = Standard deviation.
  2. BMI-Body Mass Index.