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Table 1: 
Characteristics of patients with cerebral vasospasm treated with ≥3 interventions compared with those treated with ≤2 interventions
CharacteristicsGroup I: 1 or 2 InterventionsGroup II: 3–6 InterventionsAll PatientsP Value
Cases (No.) (%)52 (63)31 (37)83 (100)
Age (mean) (range) (yr)55.5 ± 11.3, 24–7552.1 ± 8.6, 34–7754.2 ± 10.5, 24–77.158
Women (No.) (%)42 (81)24 (77)66 (80).782
Hunt and Hess grade (No.) (%)
    HH scale ≤227 (52)11 (36)38 (46).176
    HH scale ≥325 (48)20 (64)45 (54).176
Fisher grade 3 (No.) (%)46 (89)30 (97)76 (92).248
GCS at admission
    Mild21 (41)13 (42)34 (42).999
    Moderate8 (16)9 (29)17 (21).162
    Severe22 (43)9 (29)31 (38).245
Aneurysms location (No.) (%)
    Anterior33 (64)21 (68)54 (65).813
    Posterior19 (36)10 (32)29 (35).813
Multiple aneurysms17 (33)13 (42)30 (36).481
Aneurysm obliteration
    Clipping19 (36)5 (16)24 (29).078
    Coiling33 (64)26 (84)59 (71).078
Intracerebral hemorrhage7 (14)9 (29)16 (20).15
Intra-arterial spasmolysis
    No. of treatments (mean) (range)78 (1.5 ± 0.5, 1–2)132 (4.3 ± 1.6, 3–10)210 (2.5 ± 1.7, 1–10)<.001
    No. of vessel segments treated (mean) (range)152 (2.9 ± 1.5, 1–6)298 (9.6 ± 6.6, 4–40)450 (5.4 ± 5.3, 1–40)<.001
    No. of vascular territories (mean) (range)85 (1.6 ± 0.7, 1–3)72 (2.3 ± 0.8, 1–3)157 (1.9 ± 0.8, 1–3)<.001
PTA (No.) (%)9 (17)17 (55)26 (31).001
Vessel dissections (No.) (%)1 (2)5 (16)6 (7).03
Follow-up (mean) (median) (range) (mo)12 ± 8.7, 10, 1–2410 ± 6.3, 9, 2–2211 ± 7.9, 10, 1–24.316