Table 3.

Assessment of accuracy and completeness of FOBT by medicare claim, medical record, and self-report, 2001-2002

Data sources compared*Type of testTest was found in:
Measures of concordance
Both sources (A)Source 1 only (B)Source 2 only (C)Neither source (D)Sensitivity (95% CI)Specificity (95% CI)PPV (95% CI)NPV (95% CI)Agreement (95% CI)
Claim to medical recordIn past 1 y63564639658 (48-67)88 (85-91)53 (44-62)90 (87-92)82 (79-85)
In past 2 y102906230762 (55-70)77 (73-81)53 (46-60)83 (79-87)73 (69-77)
Self-report to medical recordIn past 1 y511105834247 (37-56)76 (72-80)32 (24-39)86 (82-89)70 (66-74)
In past 2 y1001476425061 (54-68)63 (58-68)40 (34-47)80 (75-84)62 (58-66)
Self-report to claimIn past 1 y471147232840 (31-48)74 (70-78)29 (22-36)82 (78-86)67 (63-71)
In past 2 y961529621850 (43-57)59 (54-64)39 (33-45)69 (64-75)56 (52-60)
  • NOTE: Formulas for assessment statistics: sensitivity = [A / (A + C)] × 100; specificity = [D / (B + D)] × 100; positive predictive value = [A / (A + B)] × 100; negative predictive value = [D / (C + D)] × 100; agreement = [(A + D) / (A + B + C + D)] × 100.

    Abbreviations: PPV, positive predictive value; NPV, negative predictive value.

  • * Comparisons are made using the second source listed (source 2) as the “criterion standard.”