Correlation between Ultrasound Reflection Intensity and Tumor Ablation Ratio of Late-Stage Pancreatic Carcinoma in HIFU Therapy: Dynamic Observation on Ultrasound Reflection Intensity

Table 2

Impact of the variables on variation of ultrasound reflection intensity.

Parameter	Variation of ultrasound reflection intensity		𝑇-value/𝑍-value	P value
	Group A (significant) (𝑛=14)	Group B (insignificant) (𝑛=17)
Age	63.1±13.4	69.4±9.4	1.547	0.133
Post-HIFU tumor size (cm^3)	51.0±89.8	67.5±80.1	−0.953*	0.341
Therapy frequency	10.2±4.3	8.9±4.3	−0.823	0.417
Average tumor ablation time (min)	62.8±6.9	57.0±9.2	−1.961	0.059
Therapy duration (min)	649.3±316.2	517.3±287.4	−1.310*	0.190
TSD (cm)	7.1±1.7	9.0±1.3	3.516	0.001

 *Mann-Whitney 𝑈 test was applied for skewed data.