Table 2.
Counts and calculated values for determination of accuracy of patient self-report.
| Characteristics | TPa | FPb | TNc | FNd | Prevalence | Sne | Spf | PPVg | NPVh | Agreement | Kappa (95% CI) | |
| 90-day admission (all payers) |
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Admission | 4 | 2 | 239 | 0 | 0.02 | 1.00 | 0.99 | 0.67 | 1.00 | 0.99 | 0.80 (0.52 to 1.00)i |
| 90-day events (Anthem primary) |
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Emergency room/urgent care visit | 3 | 7 | 148 | 0 | 0.02 | 1.00 | 0.95 | 0.30 | 1.00 | 0.96 | 0.45 (0.11 to 0.78)i |
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Pulmonary embolism | 1 | 0 | 120 | 0 | 0.01 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 (1.00 to 1.00)i |
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Surgical site infection | 3 | 3 | 149 | 2 | 0.03 | 0.6 | 0.98 | 0.50 | 0.99 | 0.97 | 0.53 (0.17 to 0.89)i |
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Deep vein thrombosis | 1 | 1 | 115 | 3 | 0.03 | 0.25 | 0.99 | 0.50 | 0.97 | 0.97 | 0.32 (–0.17 to 0.81) |
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Fracture/dislocation | 0 | 3 | 152 | 0 | 0.00 | N/Aj | 0.98 | 0.00 | 1.00 | 0.98 | 0.00 (0.00 to 0.00) |
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Severe constipation | 0 | 1 | 154 | 0 | 0.00 | N/A | 0.99 | 0.00 | 1.00 | 0.99 | 0.00 (0.00 to 0.00) |
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Hemorrhage | 0 | 2 | 154 | 1 | 0.01 | 0.00 | 0.99 | 0.00 | 0.99 | 0.98 | –0.01 (–0.02 to 0.00) |
aTP: true positive.
bFP: false positive.
cTN: true negative.
dFN: false negative.
eSn: sensitivity.
fSp: specificity.
gPPV: positive predictive value.
hNPV: negative predictive value.
iIndicates statistical significance.
jN/A: not applicable.