Table 1 Characteristics, management and outcome of the patients

Age, years

53 [45–64]

Gender, Woman, n (%)

90 (61)

Hypertension, n (%)

69 (47)

Characteristics on admission

Glasgow Coma Scale

15 [13–15]

 Glasgow Coma Scale 15, n (%)

82 (55)

 Glasgow Coma Scale 13–14, n (%)

32 (22)

 Glasgow Coma Scale 7–12, n (%)

22 (15)

 Glasgow Coma Scale 3–6, n (%)

12 (8)

Neurological deficit, n (%)

40 (27)

WFNS grading scale^a

1 [1–3]

 WFNS 1, n (%)

82 (55)

 WFNS 2, n (%)

23 (16)

 WFNS 3, n (%)

9 (6)

 WFNS 4, n (%)

22 (15)

 WFNS 5, n (%)

12 (8)

Fisher scale

4 [2–4]

 Fisher 1, n (%)

17 (11)

 Fisher 2, n (%)

21 (14)

 Fisher 3, n (%)

29 (20)

 Fisher 4, n (%)

81 (55)

Characteristics of the aneurysm

Number of aneurysms > 1, n (%)

15 (10)

Aneurysm size, mm^b

5.4 [4.1–8.0]

Location of aneurysm

 Anterior artery (cerebral and communicating), n (%)

61 (41)

 Internal carotid artery, n (%)

29 (20)

 Middle cerebral artery, n (%)

19 (13)

 Basilar artery, n (%)

9 (6)

 Posterior inferior cerebellar artery, n (%)

8 (5)

 Pericallosal artery, n (%)

6 (4)

 Sine materiae subarachnoid hemorrhage, n (%)

16 (11)

Complications before securing

Acute hydrocephalus, n (%)

49 (33)

Intracranial hypertension, n (%)

24 (16)

Rebleeding, n (%)

4 (3)

Interventions before transatlantic transfer

Tracheal intubation with mechanical ventilation, n (%)

70 (47)

External ventricular drain, n (%)

63 (42)

Time from bleeding to coiling, days^c

2 [2–3]

Main outcomes

30-day mortality, n (%)

13 (9)

One-year mortality, n (%)

24 (16)

Glasgow outcome scale at hospital discharge^d

5 [3–5]

 Glasgow outcome scale 1–3, n (%)

34 (34)

 Glasgow outcome scale 4–5, n (%)

65 (66)

Modified Rankin scale at hospital discharge^e

2 [1–5]

 Modified Rankin scale 0–3, n (%)

69 (69)

 Modified Rankin scale 4–6, n (%)

31 (31)