Table 1.

Details of the normal tissue complication probability (NTCP) models used in the analysis. The Lyman-Kutcher-Burman model is abbreviated by LKB.

Model	Endpoint	Severity grade	Type of model	NTCP parameters
Marks et al. (2010) [24]	Radiation pneumonitis	1–3	QUANTEC, logistic fit	TD50 = 30.8 Gy, γ50 = 0.97
Appelt et al. (2014) [25]	Radiation pneumonitis	1–3	Modified QUANTEC, uses clinical factors	TD50 = 34.4 Gy, γ50 = 1.19
Tucker et al. (2013) [26]	Radiation pneumonitis	≥3	Lyman-KutcherBurman	TD50 = 43.2 Gy, 𝑚 = 0.31, 𝑛 = 0.41
Belderbos et al. (2005) [28]	Acute esophageal toxicity	≥2	Lyman-Kutcher-Burman	TD50 = 47 Gy, 𝑚 = 0.36, 𝑛 = 0.69
Chapet et al. (2005) [30]	Acute esophageal toxicity	2–3	Lyman-Kutcher-Burman	TD50 = 51 Gy, 𝑚 = 0.44, 𝑛 = 0.32
Eriksson et al. (2000) [31]	Long-term cardiac failure		Relative seriality model	TD50 = 70.3 Gy, γ = 0.96, 𝑠 = 1
Gagliardi et al. (1996) [32]	Long-term cardiac failure		Relative seriality model	TD50 = 52.3 Gy, γ = 1.28 𝑠 = 1