Demographic | Total | Reduced semen quality | P-value | |
---|---|---|---|---|
Mean (SD) | (N = 104) | No (N = 48) | Yes (N = 56) | |
Age (years) | 34.00 (5.5) | 33.67 (5.1) | 34.30 (5.8) | 0.55 |
Education a | 3.57 (1.2) | 3.77 (1.1) | 3.39 (1.3) | 0.10 |
Income b | 3.90 (1.0) | 4.06 (0.9) | 3.77 (1.0) | 0.12 |
Tobacco smoking c | 0.06 (0.2) | 0.04 (0.2) | 0.07 (0.3) | 0.51 |
Alcohol consumption (standard drinks/week) | 6.86 (8.5) | 7.13 (10.1) | 6.63 (6.8) | 0.77 |
Bedtime (hour in 24-h format) | 22.72 (0.9) | 22.58 (0.8) | 22.86 (0.9) | 0.09 |
Sleep duration (hours/day) | 7.24 (0.9) | 7.42 (0.66) | 7.09 (1.0) | 0.05* |
Global PSQI score | 8.17 (2.3) | 7.69 (1.9) | 8.59 (2.4) | 0.04* |