Research Article

Preoperative Hematocrit Concentration and the Risk of Stroke in Patients Undergoing Isolated Coronary-Artery Bypass Grafting

Table 2

Effects of preoperative hematocrit concentration on 30-day postoperative stroke.

VariableOdds of stroke
ORunadj (95% CI)ORadj-1 (95% CI)ORadj-2 (95% CI)

Preoperative hematocrit concentration
(continuous variable, per 1% decrease)
 All patients ( ,313)1.09 (1.04–1.15)1.09 (1.03–1.15)1.07 (1.01–1.13)
 Men ( ,703)1.11 (1.04–1.18)1.10 (1.04–1.17)1.08 (1.01–1.16)
 Women ( )1.05 (0.93–1.17)1.04 (0.92–1.17)1.02 (0.91–1.16)
Preoperative hematocrit concentration
(categorized)
 All patients <37% versus ≥37%1.92 (1.05–3.51)1.76 (0.93–3.35)1.49 (0.76–2.91)
 Men <37% versus ≥37%3.07 (1.49–6.34)2.80 (1.34–5.88)2.39 (1.08–5.26)
 Women <38% versus ≥38%2.88 (0.63–13.10)2.71 (0.59–12.42)2.52 (0.53–11.98)

ORunadj: Unadjusted odds ratio.
ORadj-1: Adjusted odds ratio according to Model 1. Adjusted for age, sex, and race.
ORadj-2: Adjusted odds ratio according to Model 2. Adjusted for all variables in Table 1.