PT - JOURNAL ARTICLE AU - J R Willcox AU - M W Adler AU - E M Belsey TI - Observer variation in the interpretation of Gram-stained urethral smears: implications for the diagnosis of non-specific urethritis. AID - 10.1136/sti.57.2.134 DP - 1981 Apr 01 TA - The British Journal of Venereal Diseases PG - 134--136 VI - 57 IP - 2 4099 - http://sti.bmj.com/content/57/2/134.short 4100 - http://sti.bmj.com/content/57/2/134.full SO - Br J Vener Dis1981 Apr 01; 57 AB - A study was carried out to determine whether the diagnosis of non-specific urethritis was affected by differences in the microscopical interpretation of urethral smears between individual observers (interobserver variation) and the same observer on separate occasions (intraobserver variation). A marked degree of both intraobserver and interobserver variation was found which--depending on the diagnostic criteria adopted--could affect both the diagnosis and treatment of many patients attending a clinic of genitourinary medicine.