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© 1985 Oxford University Press

research-article

MORTALITY AND HIGH HAEMATROCRIT IN THE VERY AGED

RAUNO J. HEIKINHEIMO, Chief Physician*, MATTI V. HAAVISTO, Senior Physician, MIKKO J. KOIVUNEN, Senior Physician, KARI J. MATTILA, Senior Lecturer in General Practice and SULO A. RAJALA, Senior Physician

Department of Geriatric Medicine, Tampere City Hospital, and Department of Public Health, Tampere University SF 33500 Tampere, Finland

*Address correspondence to: Rauno Heikinheimo, MD, Tampere City Hospital, Parantolankatu 6, SF-33500 Tampere 50, Finland.

A series of 543 people, aged 85 years or more was studied and divided into groups according to haematocrit value. The mortality of the subjects was followed over the next 5 years.

The mortality in the lowest haematocrit groups was highest during the whole observation period. Further, in the haematocrit bracket greater double equals0.48, the mortality in the first year was higher than in those with haematocrit 0.40–0.47. In the second year this increased mortality had disappeared and in the third-fifth years decreased mortality was found with high haematocrit. Initially high haematocrit also decreased during the observation period.

Since the increased mortality associated with high haematocrit disappeared it cannot be based on any chronic disease but on some disappearing factor, e.g. simply the high haematocrit itself.

accepted in revised form October 24, 1984.


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