Table 2.

Predictors of anemia (Hb ≤ 100 g/L) during admission for subarachnoid hemorrhage, clustered by center

Univariate analysis				Multivariable model (n = 437; 238 events)
Variable	OR	95% CI	p Value	Variable	OR	95% CI	p Value
Age (increase by 10 yr)	1.02	0.97–1.08	0.472	Age (increase by 10 years)	0.99	0.91–1.09	0.913
Sex (female vs other)	2.82	1.76–4.50	< 0.0001	Sex (female vs other)	1.91	1.08–3.40	0.027
Hx of oral AC use	6.17	2.79–14.97	< 0.0001	Hx of oral AC use	5.98	2.11–16.95	0.001
Admission hemoglobin (increase by 10 g/L)	0.35	0.32–0.39	< 0.0001	Admission hemoglobin (increase by 10 g/L)	0.55	0.43–0.71	< 0.0001
Modified Fisher grade 3–4 vs 0–2a	1.42	0.98–2.08	0.067	Modified Fisher grade 3–4 vs 0–2a	1.96	1.07–3.57	0.028
Anterior circulation (vs posterior)	0.98	0.65–1.48	0.929	Anterior circulation (vs posterior)	0.58	0.30–1.13	0.107
Aneurysm size (increase by 1 mm)	1.03	1.02–1.05	< 0.0001	Aneurysm size (increase by 1 mm)	1.03	0.98–1.07	0.226
Clip (vs other)	3.19	2.09–4.85	< 0.0001	Clip (vs other)	4.62	2.46–8.69	< 0.0001
Vasospasm (preanemia)	0.78	0.52–1.17	0.223	Vasospasm (preanemia)	1.49	0.79–2.80	0.214

Abbreviations: AC Anticoagulant, antiplt Antiplatelet, Hb Hemoglobin, Hx History, RBCTx Red blood cell transfusion, SAH Subarachnoid hemorrhage

^aDichotomized as high (3–4) vs low (0–2) grade