Accuracy of pedicle screw insertion for unilateral open transforaminal lumbar interbody fusion: a side-by-side comparison of percutaneous and conventional open techniques in the same patients

Table 4 Comparison of the normal group and the screw misplacement group in each side

Side	Categorical variable		Normal group	Misplacement group	P-value
P-side	age		69.1	69.1	NS
	BMI*		23.7	26.3	P = 0.001
	Gender	male	78	13
	Gender	female	71	19	NS
	Inserted side	Right	66	14
	Inserted side	Left	83	18	NS
	Fixed level	1	133	27
	Fixed level	2	16	5	NS
O-side	age		68.5	72.2	NS
	BMI		24.1	24.1	NS
	Gender	male	74	17
	Gender	female	74	16	NS
	Inserted side	Right	87	14
	Inserted side	Left	61	19	NS
	Fixed level	1	130	30
	Fixed level	2	18	3	NS

ISSN: 1471-2474