Table 2.

Clinical variables related to the development of PEDH in the patients with head trauma.

Clinical variables	No. of patients	with PEDH	P value
Gender			0.6
male	251	25 (10%)
female	161	13 (8.1%)
Age (yrs)			0.25
<20	141	9 (6.4%)
20–40	176	17 (9.7%)
>40	95	12 (12.6%)
Admission GCS scores			0.87
13–15	62	5 (8.1%)
9–12	215	19 (8.8%)
3–8	135	14 (10.4%)
Decompressive craniectomy			0.001b
Yes	154	24 (15.6%)
No	258	14 (5.4%)
Skull fracturec			0.000b
Yes	132	23 (17.4%)
No	280	15 (5.4%)
Time from injury to 1st CT			0.001b
<2 hours	193	28 (14.5%)
2–6 hours	158	9 (5.7%)
>6 hours	61	1 (1.6%)
Coagulopathyc			0.004b
Yes	67	13 (19.4%)
No	345	25 (7.3%)
Hypotensionc			0.000b
Yes	74	16 (21.6%)
No	338	22 (6.5%)

PEDH: progressive epidural hematoma; GCS: Glasgow Coma Score; CT: computerized tomography.

^a χ ² test P < 0.05 difference between groups.

^b χ ² test P < 0.01 difference between groups.

^cAccording to the definition outlined earlier.