TABLE 1.
Comparison of manually abstracted occurrences of ischemic heart disease (IHD; including ‘hard’ or ‘soft’ IHD, myocardial infarction, percutaneous coronary intervention or coronary artery bypass grafting) from primary care electronic medical records versus administrative data
| Rule label | Total agreement, % | Sensitivity, % | Specificity, % | PPV, % | NPV, % | Kappa |
|---|---|---|---|---|---|---|
| 1 CIHI | 96.1 (94.9–97.3) | 62.1 (51.9–72.3) | 99.4 (98.9–99.9) | 91.5 (84.4–98.6) | 96.4 (95.2–97.6) | 0.72 (0.64–0.80) |
| 1 OHIP or CIHI | 92.0 (90.2–93.7) | 85.1 (77.6–92.5) | 92.6 (90.9–94.4) | 53.2 (44.9–61.5) | 98.4 (97.6–99.3) | 0.61 (0.53–0.67) |
| 2 OHIP in 1 year | 95.4 (94.0–96.7) | 72.4 (63.0–81.8) | 97.6 (96.6–98.6) | 75.0 (65.7–84.3) | 97.3 (96.2–98.4) | 0.71 (0.63–0.79) |
| 2 OHIP in 1 year or CIHI | 95.7 (94.4–97.0) | 77.0 (68.2–85.9) | 97.5 (96.5–98.5) | 75.3 (66.3–84.2) | 97.7 (96.7–98.7) | 0.73 (0.66–0.81) |
| 2 OHIP in 2 years or CIHI | 95.6 (94.3–96.9) | 77.0 (68.2–85.9) | 97.4 (96.3–98.4) | 74.4 (65.4–83.5) | 97.7 (96.7–98.7) | 0.73 (0.66–0.81) |
| 2 OHIP in 3 years or CIHI | 95.7 (94.4–97.0) | 78.2 (69.5–86.8) | 97.4 (96.3–98.4) | 74.7 (65.8–83.7) | 97.8 (96.9–98.8) | 0.74 (0.67–0.82) |
| 3 OHIP in 1 year or CIHI | 95.6 (94.3–96.9) | 72.4 (63.0–81.8) | 97.8 (96.9–98.8) | 76.8 (67.7–86.0) | 97.3 (96.2–98.4) | 0.72 (0.64–0.80) |
| All specialist, or GP in hospital or emergency – 2 OHIP in 1 year or CIHI | 95.8 (94.5–97.0) | 73.6 (64.3–82.8) | 98.0 (97.0–98.9) | 78.0 (69.1–87.0) | 97.4 (96.4–98.5) | 0.73 (0.66–0.81) |
| At least one specialist, or GP in hospital or emergency – 2 OHIP in 1 year or CIHI | 96.1 (94.9–97.3) | 77.0 (68.2–85.9) | 98.0 (97.0–98.9) | 78.8 (70.1–87.5) | 97.7 (96.8–98.7) | 0.76 (0.68–0.83) |
Data in parentheses represent the 95% CI for each point estimate. Gold standard is the electronic medical records chart-abstracted IHD (n=87); total n=969 and IHD prevalence of 9.0%. CIHI Canadian Institute for Health Information Discharge Abstract Database; GP General practitioner; NPV Negative predictive value; OHIP Ontario Health Insurance Plan Physician Claims Database; PPV Positive predictive value