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Table 1 Patient and baseline characteristics

From: Simple calculation using anatomical features on pre-treatment verification CT for bladder volume estimation during radiation therapy for rectal cancer

  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)
  1. Abbreviations: yr year, SD standard deviation, Vctsim bladder volume measurement using computed tomography simulation images
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