Accidental Durotomy in Minimally Invasive Transforaminal Lumbar Interbody Fusion: Frequency, Risk Factors, and Management

Table 3

Number and relation of accidental durotomies and BMI.

Durotomy		BMI (kg/m^2)		Total
		<25	≥25
	Levels operated	162	320	482
No	% without durotomy	33.6%	66.4%	100%
	% within BMI group	97.0%	92.2%
	Levels operated	5	27	32
Yes	% with durotomy	15.6%	84.4%	100%
	% within BMI group	3.0%	7.8%

The two-tailed Fisher exact test showed a statistically significant relation of accidental durotomies to overweight patients ( = 0.0493).
BMI: body mass index.