Prognosis of primary care patients aged 80 years and older with lower respiratory tract infection.

Background: Predictors for a complicated course of a lower respiratory tract infection (LRTI) episode among patients aged > or =80 years are unknown.

Aim: To determine prognostic factors for hospital admission or death within 30 days after first onset of LRTI among primary care patients aged > or =80 years.

Design Of Study: Retrospective cohort study.