Table 1. Baseline characteristics of the subjects (n=15,435).
| Characteristic | Mean±standard deviation | Range |
|---|---|---|
| Mean age (y) | 71.95±7.63 | 50~96 |
| BMI (kg/m2) | 23.59±3.08 | 13.2~40.0 |
| Mean PSA (ng/mL) | 1.45±1.45 | 0.10~9.83 |
| Mean IPSS | 15.53±8.31 | 0~35 |
| Subscore 1 | 2.16±1.63 | 0~5 |
| Subscore 2 | 2.08±1.56 | 0~5 |
| Subscore 3 | 2.09±1.61 | 0~5 |
| Subscore 4 | 2.11±1.58 | 0~5 |
| Subscore 5 | 2.84±1.59 | 0~5 |
| Subscore 6 | 1.93±1.67 | 0~5 |
| Subscore 7 | 2.33±1.34 | 0~5 |
| Mean QoL | 3.48±1.25 | 0~6 |
| Mean PV (mL) | 29.72±14.02 | 7.28~233.30 |
BMI: body mass index, PSA: prostate-specific antigen, IPSS: international prostate symptom score, QoL: quality of life, PV: prostate volume.