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Table 1 Characteristics of study participants

From: Effects of low lead exposure on sperm quality and sperm DNA methylation in adult men

  Groups All participant [mean (sd)] RL group [mean (sd)] RM group [mean (sd)] RH group [mean (sd)]
Statics N 297 138 91 68
Age 297 32.71 (6.92) 32.52 (6.98) 32.91 (7.09) 32.82 (6.64)
Alcohol (yes) 271 91.2% 92.8% 91.1% 88.2%
Smoke (cigarettes per day) 297 9.77 (8.85) 9.66 (9.68) 9.3 (8.09) 10.62 (8.08)
Blood Pb (µg/dL) 297 3.15 (2.39) 1.09 (0.79) 3.68 (0.69) 6.60 (1.47)
Blood Cd (µg/dL) 297 5.87 (6.44) 3.9 (4.85) 7.05 (6.76) 8.3 (7.61)
Left testicular volume (mL) 297 22.79 (5.69) 22.2 (5.51) 23.97 (6.16) 22.43 (5.23)
Right testicular volume (mL) 297 22.6 (5.81) 22.17 (5.51) 23.24 (6.64) 22.59 (5.19)
Rapid progressive motility % 297 27.35 (14.97) 27.4 (15.07) 27.91 (15.69) 26.48 (13.94)
Slow progressive motility % 297 14.01 (6.62) 13.43 (6.51) 14.27 (6.58) 14.85 (6.86)
Non-progressive motility % 297 13.38 (8.87) 12.26 (8.14) 13.11 (8.16) 16.02 (10.63)
Sperm concentration (106/mL) 296 54.54 (43.37) 49.61 (39.87) 60.96 (49.5) 55.9 (40.69)
Sperm viability % 183 64.26 (18.91) 64.07 (18.39) 63.95 (20.33) 65.01 (18.75)
FSH (IU/L) 294 5.14 (2.47) 5.17 (2.7) 5.02 (2.51) 5.26 (1.9)
LH (U/L) 294 5.26 (2.52) 5.42 (2.86) 5.13 (2.3) 5.14 (2.02)
T (ng/mL) 294 5.55 (1.92) 5.39 (1.84) 5.49 (1.73) 5.96 (2.26)
BPA (µg/µmolcr) 297 1.71 (9.52) 1.13 (2.84) 0.89 (1.94) 3.99 (19.29)
DEHP (µg/µmolcr) 297 6.09 (30.38) 6.74 (35.79) 7.67 (31.53) 2.66 (10.27)
DBP (µg/µmolcr) 297 2.39 (7.52) 3.02 (9.41) 2.26 (6.55) 1.27 (2.96)
MEHP (µg/µmolcr) 297 3.22 (9.02) 4.02 (11.67) 3.03 (6.16) 1.87 (5.15)
Zn in Semen (mmol/L) 297 2.42 (1.27) 2.31 (1.3) 2.54 (1.28) 2.48 (1.19)
Ca in Semen (mmol/L) 297 9.52 (3.83) 9.27 (3.89) 9.59 (3.73) 9.96 (3.85)
Mg in Semen (mmol/L) 297 4.48 (3.01) 4.18 (2.92) 4.66 (2.91) 4.82 (3.3)
Uzn in Urine (mmol/L) 297 10.34 (7.81) 10.45 (8.31) 10.25 (6.94) 10.25 (7.96)
Uca in Urine (mmol/L) 297 3.06 (2.23) 3.16 (2.36) 2.93 (2.07) 3.02 (2.22)
Umg in Urine (mmol/L) 297 1.98 (0.97) 1.99 (1.02) 1.94 (0.89) 2 (0.96)