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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2015 May 1;92(5):1053–1059. doi: 10.1016/j.ijrobp.2015.04.039

Table 3. Summary of clinical target volume agreement statistics for RPS1 and RPS2.

Agreement parameter RPS1 RPS2
Maximum volume (cc) 2386.7 1889.0
Minimum volume (cc) 1278.5 1383.5
Mean volume (cc) 1783.8 1663.5
Standard deviation (SD) 308.0 169.6
SD as a % of mean volume 17.3% 10.2%
STAPLE 95 consensus volume (cc) 2011.9 1751.2
Intersection volume IV (cc) 1044.0 1145.1
IV as a % of mean volume 58.5% 68.8%
Union volume (cc)* 2622.6 2139.1
Mean agreement sensitivity (±SD) 0.82 ± 0.10 0.90 ± 0.07
Mean agreement specificity (±SD) 0.99 ± 0.02 0.98 ± 0.01
Overall kappa statistic (P value) 0.79 (<.0001)“Substantial” 0.86 (<.0001)“Almost perfect”

Abbreviation: STAPLE = simultaneous truth and performance level estimation. Other abbreviations as in Table 1.

*

Union volume is the largest volume assuming outermost contours.