PT - JOURNAL ARTICLE AU - D Lieberman AU - P Shvartzman AU - I Korsonsky AU - D Lieberman TI - Aetiology of respiratory tract infections: clinical assessment versus serological tests. DP - 2001 Dec 01 TA - British Journal of General Practice PG - 998--1000 VI - 51 IP - 473 4099 - http://bjgp.org/content/51/473/998.short 4100 - http://bjgp.org/content/51/473/998.full SO - Br J Gen Pract2001 Dec 01; 51 AB - Two hundred and fifty ambulatory patients with febrile respiratory tract infections were included in a prospective study, aimed at determining the reliability of physicians judgements relating to the aetiology of the infection. Compared with advanced serological testing, physicians' judgements for a bacterial/atypical, rather than viral, aetiology had a negative predictive value of 60% and a positive predictive value of only 50%. We conclude that physicians' ability to assess whether the infectious aetiology of RTI is viral or bacterial/atypical is low and no more reliable than tossing a coin.