Table 1.

Univariate analysis of patient characteristics associated with occurrence of inadequate or non-diagnostic biopsy result and post-operative complications.

Characteristic	No. of initial procedures	Inadequate / non-diagnostic result		Post-procedural adverse events
Patient Characteristics
All patients	142	14 (9.9)		4 (2.8)
Categorical variables	n (%)	n (%)	P	n (%)	P
Gender			0.9491		0.2336
Male	62 (43.7)	6 (42.9)		3 (75.0)
Female	80 (56.3)	8 (57.1)		1 (25.0)
Ethnicity			0.1580		0.7717
White	97 (68.3)	12 (85.7)		3 (75.0)
African-American	43 (30.3)	2 (14.3)		1 (25.0)
Others	2 (1.4)	0 (0)		0 (0)
Obese**			0.0967		0.1017
Yes	27 (19.0)	4 (28.6)		3 (75.0)
No	115 (81.0)	10 (71.4)		1 (25.0)
Continuous variables	Median (range)	Median (range)	P	Median (range)	P
BMI	19.7 (13.3-42.1)	22.7 (17.5-28.4)	0.7966	27.0 (18.9-29.1)	0.2082
Weight (kg)	53.6 (11.8-115.1)	58.2 (39.6-94.1)		71.0 (59.7-90.8)
Height (cm)	159.0 (83.7-188.0)	165.0 (129.6-182.6)		171.3 (158.0-177.8)
Age at biopsy (years)	13.4 (1.8-23.0)	15.1 (8.3-20.0)	0.2656	14.0 (11.8-20.0)	0.3604

^**Body mass index of >30 if age greater than or equal to 20 or BMI percentile greater than 95% if age less than 20.