Table 5

Range of sensitivities and PPVs stratified by administrative data source, type of ICD code and country of origin

Range of sensitivitiesRange of PPVs
Administrative data source
 Inpatient (primary position only)53%–99% (18 studies)15%–98% (19 studies)
 Outpatient (outpatient diagnosis only)9% (1 study)19% (1 study)
Type of ICD
 ICD-9 (initial algorithm)53%–97% (15 studies)15%–98% (16 studies)
 ICD-10 (initial algorithm)69%–99% (3 studies)57%–86% (3 studies)
Country of origin
 USA (initial algorithm)53%–97% (12 studies)15%–96% (13 studies)
 Italy (initial algorithm)74%–85% (2 studies)90%–91% (2 studies)
 France (initial algorithm)69%–85% (2 studies)57%–98% (2 studies)
 Japan (initial algorithm)99% (1 study)66% (1 study)
 Australia (initial algorithm)86% (1 study)86% (1 study)
Accuracy over time
 Before 2001 (initial algorithm)57%–97% (7 studies)74%–96% (9 studies)
 After 2000 (initial algorithm)53%–99% (11 studies)15%–98% (10 studies)
  • ICD, International Classification of Disease; PPV, positive predictive value.