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 3 Comparison of variables for pedicle screw misplacement in the PPS side and the open side

Categorical variable		P-side	O-side	P-value
Age (year ± SD)		69.2 ± 10.8	72.1 ± 8.9	NS
Gender	male	13	17	NS
Gender	female	19	16	NS
Side	Right	14	16	NS
Side	Left	19	21	NS
Fixed level	single	27	30	NS
Fixed level	double	5	3	NS
BMI* (m/kg² ± SD)		26.3 ± 4.0	24.1 ± 3.6	P = 0.027

SD Standard deviation, BMI Body Mass Index, NS nonsignificant, P-side PPS side, O-side Open side
*P < 0.05

ISSN: 1471-2474