Palmitoylethanolamide in the Treatment of Failed Back Surgery Syndrome

Table 3

Statistical analysis.

		Estimated difference	SE	value
Presurgery ()	Surgery ()	1.833	0.166	<0.0001
Surgery ()	Enrollment ()	−0.683	0.170	0.005
Enrollment ()		1.483	0.144	<0.0001
		1.625	0.149	<0.0001
		0.975	0.129	<0.0001