Modified surgical method of supra- and infratentorial epidural hematoma and the related anatomical study of the squamous part of the occipital bone

Table 1 Statistical analysis of the angle of the squamous part of the occipital bone and the operative angle for the supra- and infratentorial epidural hematoma between male and female

	Male (n = 16), mean ± SD (min, max)	Female (n = 16), mean ± SD (min, max)	t	P value
ASOB	118.4 ± 4.7 (108.3, 126.9)	130.4 ± 5.1 (123.2, 139.1)	6.946	< 0.001a
OAS	15.1 ± 1.8 (12.6, 18.5)	12.8 ± 2.0 (8.6, 16.4)	3.301	0.003a

^aP < 0.05. ASOB: Angle of the squamous part of the occipital bone; OAS: Operative angle for the SIEDH.

Table 2 Comparison of glasgow coma score before and after operation

	GCS
Preoperation	9, 9, 9, 10, 10, 10, 10, 11
Postoperation	10, 10, 10, 10, 11, 11, 12, 13
Rank sum test	P = 0.037a

^aP < 0.05. GCS: Glasgow coma score.