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Table 1 Quality of studies of asymptomatic subjects

From: Validity of electron beam computed tomography for coronary artery disease: asystematic review and meta-analysis

Item Value Wong et al. [6] Arad et al. [11] Raggi et al. [7] Kondos et al. [8] Shaw et al. [9] Greenland et al. [10] Taylor et al. [12] Vliegenthart et al. [13] LaMonte et al. [14]
Patient recruitment 1: Self referred 2 NR 2 1 2 1 3 3 2
  2: Clinician referred          
  3: Population sample          
Exclusion criteria 1: Did not exclude history of heart disease 2 2 NR 2 2 2 2 2 2
  2: Excluded history of heart disease          
Outcome defined 1: All cause mortality 2 2 3 3 1 3 3 2 2
  2: Coronary outcomes* and revascularization          
  3: Coronary outcomes* only          
EBCT categories 1: Quartiles or pre-selected cut-offs 1 1 2 1 1 1 1 1 1
  2: Age – sex adjusted          
Outcome extraction blinded to EBCT score 1: No 2 2 2 2 2 2 2 2 2
  2: Yes          
Demographic characteristics, risk factors NR: Not reported 1 1 1 1 1 1 1 1 1
  1: Reported (see Table 3)          
Percentage follow-up NR: Not reported NR 1 1 1 1 1 1 1 1
  1: Yes (see Table 4)          
Adjusted results available 1: Yes but cannot be used in meta-analysis 1 1 3 2 3 3 2 3 3
  2: Yes at single cut-off and can be used in meta-analysis.          
  3: Yes at multiple cut-offs and can be used in meta-analysis          
Total Maximum: 17 11 11 14 13 13 14 15 15 14
  1. *Coronary outcomes: angina, myocardial infarction, coronary death.