Table 2 Sensitivity, specificity, PPV, and NPV of ICD-10-CA with adjudicated ED diagnosis as reference standard
Diagnosis | Coding algorithm n (%) | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|---|
TIA Prevalence 163 (39.1%) | Main position 79 (18.9%) | 36.8 [29.4, 44.7] | 92.5 [88.6, 95.4] | 76.0 [65.0, 84.9] | 69.5 [64.3, 74.4] |
Any position 99 (23.7%) | 42.3 [34.6, 50.3] | 88.2 [83.6, 91.9] | 69.7 [59.7, 78.5] | 70.4 [65.1, 75.4] | |
Main position +/− Q 122 (29.3%) | 53.4 [45.4, 61.2] | 86.2 [81.4, 90.2] | 71.3 [62.4, 79.1] | 74.2 [68.9, 79.1] | |
Any position +/− Q 151 (36.2%) | 63.8 [55.9, 71.2] | 81.5 [76.2, 86.1] | 68.9 [60.8, 76.2] | 77.8 [72.3, 82.7] | |
Cerebral ischemia Prevalence 318 (76.3%) | Main position 202 (48.4%) | 60.0 [54.5, 65.5] | 88.9 [81.0, 94.3] | 94.6 [90.5, 97.3] | 40.9 [34.3, 47.8] |
Any position 236 (56.6%) | 67.3 [61.8, 72.4] | 77.8 [68.3, 85.5] | 90.7 [86.2, 94.1] | 42.5 [35.2, 50.1] |