Predictive value of a 24 hour tuberculin skin test evaluation
- aOndokuz Mayis University School of Medicine, Department of Paediatrics, 55139, Samsun, Turkey, bDirectorate of Mother and Child Health, and Family Planning, Samsun, Turkey, cOndokuz Mayis University School of Medicine, Department of Public Health, Samsun, Turkey
- Dr Öztürk.
- Accepted 26 November 1996
Abstract
The predictive value of induration 24 hours after administration of purified protein derivative (PPD) was examined. Altogether 1082 healthy schoolchildren were tested using 5 tuberculin units of PPD. Induration was measured at 24, 48, and 72 hours. At 24 hours, induration of any size had a relatively low positive predictive value (63%), although indurations >5 mm had a higher (86%) positive predictive value.
