Table 1. Baseline characteristics of the participants.
| Unit | Total | Men | Women | |
|---|---|---|---|---|
| N | 583 | 178 | 405 | |
| Age | years | 47.3 ± 19.8 (19–85) | 44.7 ± 21.3 (19–85) | 48.5 ± 19.0 (19–84) |
| Height | m | 1.60 ± 0.09 (1.40–1.82) | 1.69 ± 0.07 (1.53–1.82) | 1.56 ± 0.06 (1.40–1.73) |
| Body weight | kg | 57.1 ± 10.4 (40.0–114) | 64.1 ± 11.2 (47.9–114) | 53.0 ± 7.9 (40.0–87.9) |
| BMI | kg/m2 | 22.3 ± 3.2 (16.4–40.0) | 22.4 ± 3.4 (17.6–40.0) | 21.8 ± 3.1 (16.4–32.8) |
| IPS (OE/HS) | 1.87 ± 0.34 (0.22–2.59) | 1.88 ± 0.33 (0.22–2.38) | 1.87 ± 0.35 (0.41–2.59) | |
| IPS (CE/SS) | 0.51 ± 0.28 (0.01–1.32) | 0.53 ± 0.28 (0.04–1.14) | 0.50 ± 0.28 (0.01–1.32) | |
| IPS (CE/SS)/IPS (OE/HS) | 0.26 ± 0.12 (0.01–0.61) | 0.27 ± 0.13 (0.02–0.55) | 0.26 ± 0.12 (0.01–0.61) | |
Data are means ± standard deviation. The minimums and the maximums are shown within parentheses. BMI: body mass index; IPS: index of postural stability (Refer to “IPS measurement” in SUBJECTS AND METHODS); OE/HS: open-eye/hard-surface; CE/SS: closed-eye/soft-surface.