Table 1.

Sociodemographic and clinical characteristics by groups.

		Placebo Group	ESP Group	Total	P value
Age		54.68 (+/−13.56)	52.68 (+/−10.31)	53.68 (+/−11.98)	.333
Gender	Female	12 (42.9%)	11 (39.3%)	23 (41.1%)
	Male	16 (57.1%)	17 (60.7%)	33 (58.9%)	.786
BMI		26.52 (+/−4.41)	26.48 (+/−4.62)	26.50 (+/−4.47)	.970
Injured vertebra	Th	12 (42.9%)	9 (32.1%)	21 (37.5%)
	L	16 (57.1%)	19 (67.9%)	35 (62.5%)	.408
AOSpine classification	A	21 (75%)	20 (71.4%)	41 (73.2%)
	B	7 (25.0%)	8 (28.6%)	15 (26.8%)
	C	0 (.0%)	0 (.0%)	0 (.0%)	.763
No. of screws		4.71 (+/−1.46)	4.93 (+/−1.39)	4.82 (+/−1.42)	.228
Type of implant	Top load	8 (28.6%)	11 (39.3%)	19 (33.9%)
	Side load	20 (71.4%)	17 (60.7%)	37 (66.1%)	.391