Evaluating the efficacy of percutaneous puncture biopsy guided by contrast-enhanced ultrasound for peripheral pulmonary lesions

Table 1 Demographic characteristics, lesion distribution and size in two groups, n (%)

	CEUS group	Control group	χ2/t value	P value
Age	68.0±11.0	68.1±9.6	0.095	0.93
Gender			0.001	0.96
Male	87 (73.7)	88 (73.9)
Female	31 (26.3)	31 (26.1)
Smoking history	68 (57.6)	69 (58)	0.001	0.96
Location			1.997	0.37
Upper leaf	44 (37)	42 (35.6)
Middle leaf	30 (25.2)	39 (33.1)
Lower leaf	45 (37.8)	37 (31.4)
Diameter (mm)	43.1 ± 15.8	42.0 ± 14.0	0.282	0.58
1-5 cm	83 (50.6)	81 (49.4)	0.143	0.71
≥ 5 cm	35 (47.9)	38 (52.1)

CEUS: Contrast-enhanced ultrasound.