Table 1 Characteristics of study participants by age category
Characteristics | All participants | Age category | ||
|---|---|---|---|---|
< 30 (n = 13) | 30–40 (n = 19) | > 40 (n = 19) | ||
BMI (kg/m 2 ) | ||||
Underweight (< 18.5) | 0 | 0 | 0 | 0 |
Normal (18.5–24.9) | 26 | 6 | 8 | 12 |
Overweight (25-29.9) | 20 | 5 | 9 | 6 |
Obese (≥ 30) | 5 | 2 | 2 | 1 |
Education | ||||
High school and lower | 14 | 4 | 4 | 6 |
Undergraduate and higher | 37 | 9 | 15 | 13 |
Smoking status | ||||
Non-smoker | 33 | 8 | 12 | 13 |
Smoker | 18 | 5 | 7 | 6 |
Abstinence period (days) | ||||
2–3 | 19 | 4 | 8 | 7 |
4–5 | 22 | 6 | 8 | 8 |
6–7 | 10 | 3 | 3 | 4 |