Table 1. The characteristics of healthy volunteers in the control group.
| Characteristics | Value |
|---|---|
| Male/Female | 16/3 (n = 19) |
| Age, years | |
| Mean ± standard deviation (range) | 22.1 ± 1.4 (20–26) |
| Median | 22 |
| BMI, kg/m2 | |
| Mean ± standard deviation (range) | 23.0 ± 4.4 (17.9–32.9) |
| Median | 20.7 |
Note—Unless otherwise noted, data are numbers of patients. BMI: body mass index. BMI was calculated and defined according the Department of Health in Taiwan: optimal BMI was defined as 18.5 ≦ BMI < 24 kg/m2, overweight as 24 ≦ BMI < 27 kg/m2, and obesity was defined as BMI ≧ 27 kg/m2.