Table 3.

Analysis of prognostic factors for mortality.

	Deceased patients	Surviving patients	P value
	n = 17	n = 43
Age
<15 years	4	4	0.097ω
15 to 30 years	7	14
>30 years	6	25
Gender
Male	13	33	0.750χ
Female	4	10
Pupillary examination
Constricted	3	23	0.003 ω
Unilateral dilated	6	15
Bilateral dilated (absent corneal reflex)	8 (4)	5 (2)
Initial Glasgow score
3 to 5	13	13	0.014 ω
6 to 8	2	15
>8	2	15
mean	4.3	8.0
Time to surgery
<6 h	7	13	0.183ω
6 h–24 h	3	4
24 h–7 days	7	23
>7 days	0	3
Bone flap area (cm2) (mean ± SD)	103.2 ± 24.2	98.7 ± 21.3	0.555ω
Marshall score
I	2	12	0.403ω
II	3	9
III	0	1
IV	4	13
Evacuated mass	8	8

Comparison of the group of deceased patients and the group of surviving patients as a function of various prognostic criteria. A criterion was considered to have a prognostic value when a statistically significant difference was observed between the 2 groups with P < 0.05 (α = 5%).

^ωWelch's t-test; ^χChi² test.