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Table 6 Variable assignment

From: Therapeutic Effects of Microsurgical Clipping at Different Time Points on Intracranial Aneurysm and Prognostic Factors

Variable Assignment
Age  < 58 Y = 0, ≥ 58 Y = 1
History of hypertension No = 0, Yes = 1
Preoperative intracranial hematoma volume  < 20 mL = 0, ≥ 20 mL = 1
Aneurysm size  < 8 mm = 0, ≥ 8 mm = 1
Preoperative Hunt–Hess grade Grade I = 1, grade II = 2, grade III = 3, grade IV = 4
Later surgery Within 24 h = 1, within 48 h = 2, within 72 h = 3
Postoperative complications No = 0, Yes = 1
NIHSS score  < 13 points = 0, ≥ 13 points = 1