Table 3.

Results of independent t-test and descriptive statistics for some of the highly predictive radiomic features in association with the locoregional recurrence (LRR) of the disease. Standardized maximum and peak uptake values (SUV_MAX and SUV_PEAK) are reported for comparison.

	Levene’s F-test*		t-test for Equality of Means
	F	p > .05	t	df	p < .05	Mean Difference	95% CI LB	95% CI UB
2nd-order Mean	0.18	.67	1.90	78	.046	0.14	0.07	0.29
Diff. Entropy	2.91	.09	2.21	78	.030	0.12	0.01	0.22
SAE	0.19	.67	−0.47	78	.640	−0.05	−0.25	0.15
SZV	6.43	.01	2.56	78	.012	0.22	0.05	0.39
Tumor Vol.	2.47	.12	3.23	78	.002	0.25	0.10	0.41
SUVMAX	0.04	.08	2.09	78	.047	0.30	0.01	0.60
SUVPEAK	0.06	.08	2.08	78	.040	0.31	0.21	0.97

^*Equal variances assumed.