Efficacy evaluation of neuroendoscopy vs burr hole drainage in the treatment of chronic subdural hematoma: An observational study

Table 3 Comparison of brain tissue re-expansion by computed tomography at different time points after operation in chronic subdural hematoma patients

Group	n	Postoperative time in d
		1	3	12
Neuroendoscopy	61	14 (23)	37 (61)	57 (93)
Burr hole drainage	61	5 (8)	22 (36)	51 (84)
χ2		3.990	6.433	2.017
P		< 0.05	< 0.05	> 0.05

Data are presented as n (%), unless otherwise noted.