Table 2:

Contingency table (2 × 2) showing the lack of correlation between epidural leak and type of cortical erosion, large or permeative^{^a}

	Epidural Leak+	Epidural Leak−	Total
Large CE	7	36	43
Permeative CE	3	24	27
Total	10	60	70

Note:—CE indicates cortical erosion.
↵a Fisher exact test. Two-tailed P = .730.