Table 1.
Demographic characteristics among 220 men from the Environment and Reproductive Health (EARTH) cohort
| Characteristic | N | Mean or % | SD | Median | 25th, 75th quartiles |
|---|---|---|---|---|---|
| Age | 218 | 36.66 | 5.07 | 35.97 | 32.92, 39.86 |
| BMI | 217 | 27.18 | 4.03 | 26.85 | 24.30, 29.07 |
| Abstinence period | 186 | 3.91 | 13.87 | 2.42 | 1.83, 3.04 |
| Race | |||||
| White | 194 | 88.99 | |||
| Black | 4 | 1.83 | |||
| Asian | 13 | 5.96 | |||
| Other | 7 | 3.21 | |||
| Smoking Status | |||||
| Never smoke | 153 | 70.18 | |||
| Past smoker | 52 | 23.85 | |||
| Current smoker | 13 | 5.96 | |||
| Education | |||||
| <High school | 3 | 1.65 | |||
| HS grad | 6 | 3.30 | |||
| 1 or 2 yr. college | 12 | 6.59 | |||
| 3 or 4 yr. college | 11 | 6.04 | |||
| College grad. | 61 | 33.52 | |||
| Graduate degree | 89 | 48.90 | |||
| Season of sample | |||||
| Winter | 79 | 23.58 | |||
| Spring | 79 | 23.58 | |||
| Summer | 90 | 26.87 | |||
| Fall | 87 | 25.97 | |||
SD: standard deviation; Missing: age, race, smoking n=2; BMI n=3; Abstinence period n=34; Education n=38; Season: n=355 using all observations; Winter: December–February, Spring: March–May; Summer: June–August; Fall: September–November