N | % | |
---|---|---|
Sex | ||
Female | 194 | 42.0 |
Male | 268 | 58.0 |
Position | ||
Prone | 410 | 88.7 |
Supine | 52 | 11.3 |
Mean ± SD | ||
Age (yr) | 59.1 ± 12.7 | |
Vscan (mL) | 236.0 ± 112.4 | |
Vctsim (mL) | 335.6 ± 147.5 | |
Median (range) | ||
Anatomic features (cm) | ||
Upper limit (U) | 0.99 (−7.69–9.25) | |
Lower limit (L) | 10.03 (5.61–14.18) | |
Ratio (L-U/L) | 0.91 (0.19–2.08) |