Study of the Long-Term Results of Decompressive Craniectomy after Severe Traumatic Brain Injury Based on a Series of 60 Consecutive Cases

Table 2

Functional outcome of the patients evaluated by the Glasgow Outcome Scale (GOS) 3 months and more than 24 months after decompressive craniectomy.

	Group 1		Group 2		Total		𝑃 value
	𝑛=40		𝑛=20		𝑛=60
	Number	%	Number	%	Number	%
GOS at 3 months
1	7		10		17
2	5		1		6
3	11		3		14
4	11		3		14
5	6		3		9
Death (1)	7	17.5	10	50.0	17	28.3	0.061
Unfavourable (2 + 3)	16	40.0	4	20.0	20	33.3
Favourable (4 + 5)	17	42.5	6	30.0	23	38.4
GOS after 24 months
1	7		10		17
2	5		1		6
3	4		3		7
4	14		2		16
5	10		4		14
Death (1)	7	17.5	10	50.0	17	28.3	0.012
Unfavourable (2 + 3)	9	22.5	4	20.0	13	21.7
Favourable (4 +5)	24	60.0	6	30.0	30	50.0

The 𝑃 value column corresponds to the comparison of the distribution of functional outcome between the two patient groups (Welch’s 𝑡-test).