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[Effect of sex on rheological properties of blood in adults].

The purpose of this study was to evaluate blood rheology in adult subjects aged 17-95 years. A total of 1035 volunteers (515 men and 520 women) took part in the study. The criterion of participation in the study was age over 17 years and that precluding the participation was hospital treatment. Blood, plasma, and serum viscosity and erythrocyte aggregation and deformability were analyzed on a rotation viscosimeter. Blood rheological properties depended on sex. Whole blood viscosity and plasticity were notably higher in men than in women at all ages. Whole blood viscosity in women aged 20-29, 40-49, and over 60 years is lower than in men of the same age, despite changed protein/water ratio in the plasma and serum.