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. 2020 Aug 3;88(1):82–95. doi: 10.1093/neuros/nyaa317

TABLE 2.

Comparison of Patient Characteristics and Outcomes by Age

Variable <45 yr ≥45 yr P value
Number of patients 5 27
Sex, male: female 2:3 18:9 .26
Treatment, treatment: no treatment 5: 0 16: 11 .14
Location, BAT: VBJ 1: 4 17: 10 .14
An size (mm), mean ± SD 28.00 ± 7.58 27.56 ± 5.68 .88
Atherosclerosis risk, no: yes 4:1 3: 24 .004
Bilateral Pcom patency, favorable: poor 2: 3 3: 24 .073
Preoperative mRS, 1: 2: 3: 4: 5 0: 0: 3: 2: 0 4: 2: 7: 7: 7 .37
Tx category, IRO: RPO: CR: DB: No Tx 1: 1: 3: 0: 0 6: 5 2: 3: 11 .039
Construction of bypass, no: yes 4: 1 16: 11 .63
Postoperative mRSa, 1: 2: 3: 4: 5: 6 2: 0: 1: 1: 1: 0 0: 3: 5: 7: 8: 4 .031
Latest follow-up mRS, 1: 2: 3: 4: 5: 6 3: 0: 0: 1: 0: 1 2: 1: 1: 0: 2: 21 .008
Follow-up from latest Tx (mo), mean ± SD 77.40 ± 50.14 39.25 ± 52.93 .15

An indicates aneurysm; BAT, basilar trunk; CR, clip reconstruction; DB, distal bypass; IPO, immediate proximal occlusion; mRS, modified Rankin Scale; Pcom, posterior communicating artery; RPO, remote proximal occlusion; Tx, treatment; VBJ, vertebrobasilar junction.

aFor untreated patients, mRS was obtained at 3 mo after the initial diagnosis.