Table 6.

Patients' conditions that could lead to a larger risk of dose calculation error.

Condition	No. of patients with this condition	p‐value
Lung volume larger than 3396cc	32	PTV D95 a (%)	p=0.01
		PTV mean dose (%)	p=0.04
Pathological condition of emphysema	12	PTV D95 a (%)	p<0.01
		PTV mean dose (%)	p<0.01
Electron density of the lung $0.25\hspace{0.17em}\mathrm{g}/{\text{cm}}^3$ or lower	31	PTV D95 a (%) PTV mean dose (%)	$\mathrm{p}<0.01\hspace{0.17em}\mathrm{p}=0.03$
Fully surrounded by the lung	22	PTV D95 a (%)	p=0.04
		PTV mean dose (%)	p=0.54

^aPTV D95 ‐ dose covering 95% or more of the PTV.