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Lower levels of lymphocyte blood cells may be fatal

London, Jan 13 (IANS) Lower levels of lymphocyte blood cells — a condition called lymphopenia — could be an early warning for future illness, as low counts were associated with a 60 per cent increase in death from any cause, a new study suggests.

Lymphopenia is often detected during routine blood tests, and patients are not usually referred for further investigation because the value of lymphopenia as a predictor of future health was not known.

“Our study showed that participants with lymphopenia were at high risk of dying from any cause, regardless of any other risk factor for all-cause mortality, including age,” said study researcher Stig Bojesen from Copenhagen University Hospital in Denmark , with coauthors.

For the findings, published in the Canadian Medical Association Journal (CMAJ), researchers included 108,135 people of Danish descent aged 20-100 years who were enrolled in the Copenhagen General Population Study between 2003 and 2015.

An incidental finding of a low lymphocyte count was associated with a 1.6-fold increase in the risk of death from any cause and a 1.5- to 2.8-fold increased risk of death from cancer, cardiovascular disease, respiratory disease, infections and other causes.

During the study period, a total of 10,372 people died. Older age was associated with decreasing lymphocyte counts, the researchers said.

The link between lymphopenia and death may be because of reduced immune capacity to survive potentially lethal diseases.

Lymphopenia could also indicate frailty which could lead to illness and death, the study said.

The researchers hope their findings may help doctors identify at-risk people.

“Using the absolute 2-year risks of all-cause mortality, physicians can identify high-risk individuals with lymphopenia (e.g., smokers older than 80 years) who might benefit from additional surveillance,” they said.

–IANS

bu/adr/

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