Table 2

List of ICD codes used in included studies

StudyICD codesPrimary/secondary/tertiary
Scudeller 200918No ICD code data available in study
Fedeli 201126ICD 9: 421, 98.84 or 112.81P+S
Thornhill 201114ICD 10: I33P+S
Ternhag 201316ICD 10: I33, I38 or I39Unspecified
Dayer 20152ICD 10: I33P+S
Cresti 20161ICD 9: 421 .xP+S
Erichsen 201624ICD 10: I33 or I38.9Unspecified (first-time code of incident IE recorded)
Keller 20163ICD 10: I33Unspecified
van den Brink 201631Insurance-based codes used for case extraction
Olmos 201717ICD 9: 421.0, 421.1, 421.9 or 424.99P+S
Ahtela 201811ICD 10: I33, I38 or I39 (specificity 96.8%)P (66.3%)+S (24.1%)+T (9.6%)
Jordal 201812ICD 10: I33.0, I38, or I39.0 (after year 1999)Unspecified
Ortega 201928ICD 9: 421.0, 421.1, 421.9, 112.81, 115.04, 115.14, or 115.94P+S
Jensen 20204ICD 10: I33.x, I38.x or I39.8
ICD 8: 421
P+S
Quan 202025ICD 10: I33.0, I33.9, I39.0, I39.8, I01.1, B37.6, or T82.6P+S
Shah 202013ICD 10: I33, I38 or I39
ICD 9: 421.1, 424.91, 424.90 or 424.99
Unspecified
Thornhill 202015ICD 10: I33P+S
Vähäsarja 202010No ICD code data available in study
  • ICD, International Classification of Diseases.