Table 1.
Subject characteristics
| Characteristic | Normal BMI <25.0 (n = 12) | Overweight BMI ≥25 (n = 5) |
|---|---|---|
| n (Male) | 12 (4) | 5 (2) |
| Age, yr | ||
| Mean | 24.5 ± 1.8 | 26.5 ± 4.1 |
| Range | 21.6–27.9 | 23.1–34.5 |
| Height, cm | ||
| Mean | 167.7 ± 6.2 | 166.1 ± 8.9 |
| Range | 157.0–176.5 | 153.5–176.5 |
| Weight, kg | ||
| Mean | 63.2 ± 6.6 | 75.9 ± 8.4* |
| Range | 52.4–74.7 | 64.9–85.9 |
| BMI, kg/m2 | ||
| Mean | 22.4 ± 1.4 | 27.5 ± 2.1** |
| Range | 20.2–24.7 | 25.3–31.5 |
| Waist, cm | ||
| Mean | 73.8 ± 2.3 | 82.0 ± 6.6* |
| Range | 69.0–78.8 | 73.0–89.3 |
Values are means ± SD. BMI, body-mass index; waist, waist circumference measured at umbilicus. This shows that the age and height are not different between the normal and overweight subjects. Therefore, age is not a confounding factor in considering which properties may affect brown adipose tissue characteristics between subjects. However, the population distribution of weight, BMI, and waist circumference are right-shifted (larger valued) in overweight subjects compared with normal-weight subjects.
*
P <0.05;
**
P <0.001, using the Mann-Whitney U-test to compare normal with overweight subjects.