Accuracy of Brain Computed Tomography Diagnosis by Emergency Medicine Physicians

Table 2

Inter-rater agreement between the emergency physician and radiologist.

Characteristics (N = 1524)			Cell frequency				Measures of association					Agreement
Site	ED findings	RAD findings	ED+/RAD+	ED+/RAD−	ED−/RAD+	ED−/RAD−	Sensitivity	Specificity	PPV	NPV	Accuracy	Kappa
Intracranial bleeding	24	26	18	6	8	1492	69.23	99.60	75.00	99.50	99.10	0.715
Subdural hemorrhage	20	18	12	8	6	1498	66.67	99.47	60.00	99.60	99.10	0.627
Subarachnoid hemorrhage	12	7	6	6	1	1511	85.71	99.60	50.00	99.90	99.50	0.629
Ischemic stroke	120	123	74	46	49	1355	60.16	96.72	61.67	96.50	93.80	0.575
Space-occupying lesions	22	30	18	4	12	1490	60.00	99.73	81.82	99.20	99.00	0.687
Edema, shift	24	20	14	10	6	1494	70.00	99.34	58.33	99.60	99.00	0.631
Hydrocephalus	6	7	3	3	4	1514	42.86	99.80	50.00	99.70	99.50	0.459
Cavernous sinus thrombosis	4	3	3	1	1	1520	85.71	99.93	75.00	100.00	99.90	0.857
Facial bone fracture	18	32	17	1	15	1491	53.13	99.93	94.44	99.00	99.00	0.675
Epidural	6	5	5	1	1	1518	90.91	99.93	83.33	100.00	99.90	0.909
Normal, chronic, nil acute	1295	1285	1225	70	60	169	95.33	70.71	94.59	73.80	91.50	0.672
Overall confirmed cases	230	239	170	60	69	1225	71.13	95.33	73.91	94.70	91.50	0.675