Predictive value of a 24 hour tuberculin skin test evaluation.
prospective_cohort · Level II
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- Record sourced from PubMed, PMID 9196365.
- Also identified by PMC identifier 1717171.
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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.
Medical subject headings
- Tuberculin Test
- Tuberculosis