Table 3. Descriptive statistics and hypothesis testing results for pancreas data.

Rows 1–3: Means and standard deviations of spectral parameters for normal pancreas (NP), pancreatic cancer (PC), and chronic pancreatitis (CP) cases from Study 2 (validation study). Row 4: The p-values resulting from ANOVA calculations assuming equal variance between groups. Rows 5–7: The p-values resulting from multiple comparisons using Bonferroni's criterion. Rows 8–10: Means and standard deviations of spectral parameters normal pancreas (NP), pancreatic cancer (PC), and chronic pancreatitis (CP) cases from both studies. Row 11: The p-values resulting from ANOVA calculations assuming equal variance between groups. Rows 12–14: The p-values resulting from multiple comparisons. Bonferroni's criterion was used for slope and intercept, whereas Tamhane's T2 criterion was used for midband fit and R².

Data Set	B-mode appearance	Midband Fit (dB)	Slope (dB/MHz)	Intercept (dB)	Correlation coeff. R2
Study 2 (Validation Study)	Normal Pancreas (n = 15)	−40.9±3.8	−1.44±0.31	−32.2±4.7	0.31±0.08
	Pancreatic Cancer (n = 10)	−53.3±1.2	−0.94±0.33	−47.6±2.8	0.17±0.05
	Chronic Pancreatitis (n = 3)	−49.5±3.3	−1.28±0.54	−41.8±6.5	0.25±0.10
	ANOVA p-value	< 0.001	< 0.01	< 0.001	< 0.001
	NP vs. PC p-value	< 0.01	< 0.01	< 0.001	< 0.001
	NP vs. CP p-value	< 0.001	1	< 0.01	0.59
	PC vs. CP p-value	0.21	0.43	0.14	0.27
Study 1 + Study 2	Normal Pancreas (n = 40)	−41.5±3.4	−1.86±0.76	−30.3±5.4	0.40±0.12
	Pancreatic Cancer (n = 13)	−53.2±1.1	−0.98±0.31	−47.3±2.6	0.16±0.04
	Chronic Pancreatitis (n = 7)	−50.2±2.1	−1.21±0.34	−42.8±4.0	0.26±0.07
	ANOVA p-value	< 0.001	< 0.01	< 0.001	< 0.001
	NP vs. PC p-value	< 0.001	< 0.01	< 0.001	< 0.001
	NP vs. CP p-value	< 0.001	0.055	< 0.001	< 0.01
	PC vs. CP p-value	< 0.05	1	0.14	< 0.05