Table 3.

Prognosis prediction performance for each subgroup

Subgroup	Radiomic model		Combined model
	Training, mean ± sd	Test, mean ± sd	Training, mean ± sd	Test, mean ± sd
All data (n = 304)	0.63 ± 0.01*	0.62 ± 0.03*	0.65 ± 0.01*	0.64 ± 0.04*
SCCall (n = 135)	0.60 ± 0.03	0.59 ± 0.03	0.62 ± 0.04	0.60 ± 0.05
ADCall (n = 149)	0.66 ± 0.02*	0.64 ± 0.02*	0.70 ± 0.02*	0.69 ± 0.04*
T1 (n = 93)	0.66 ± 0.03*	0.66 ± 0.04*	0.70 ± 0.02*	0.68 ± 0.03*
T2 (n = 96)	0.64 ± 0.03*	0.63 ± 0.05*	0.66 ± 0.02*	0.65 ± 0.02*
T3 (n = 49)	0.68 ± 0.02*	0.65 ± 0.03*	0.68 ± 0.04*	0.66 ± 0.06*
T4 (n = 55)	0.65 ± 0.02*	0.63 ± 0.04*	0.72 ± 0.02*	0.70 ± 0.06*
SCCT1 (n = 40)	0.59 ± 0.05	0.57 ± 0.05	0.61 ± 0.03	0.58 ± 0.04
SCCT2 (n = 41)	0.57 ± 0.04	0.55 ± 0.04	0.61 ± 0.03	0.59 ± 0.05
SCCT3 (n = 26)	0.69 ± 0.05	0.58 ± 0.04	0.71 ± 0.08	0.59 ± 0.04
SCCT4 (n = 25)	0.71 ± 0.02	0.71 ± 0.04	0.74 ± 0.05*	0.71 ± 0.03
ADCT1 (n = 46)	0.78 ± 0.02*	0.75 ± 0.05*	0.84 ± 0.03*	0.83 ± 0.04*
ADCT2 (n = 48)	0.70 ± 0.02*	0.68 ± 0.05*	0.72 ± 0.01*	0.72 ± 0.05*
ADCT3 (n = 20)	0.83 ± 0.04*	0.81 ± 0.03*	0.83 ± 0.04*	0.81 ± 0.02*
ADCT4 (n = 27)	0.71 ± 0.05*	0.70 ± 0.05*	0.75 ± 0.03*	0.73 ± 0.02*

SCC squamous cell carcinoma, ADC adenocarcinoma, sd standard deviation

*P value < 0.05