Table 4.

PPV of claims-identified seizures diagnosed in an inpatient setting by age group.

	<7 years (n abstracted = 17)				7–24 years (n abstracted = 12)
	Chart-confirmed cases (n)	Charts abstracted (n)	PPV (%)	95% CI	Chart-confirmed cases (n)	Charts abstracted (n)	PPV (%)	95% CI
All visits	11	17	64.7	38.3–85.8	4	12	33.3	9.9–65.1
ICD-9 diagnosis codea
345.xx	1	1	100.0	2.5–100.0	1	4	25.0	0.6–80.6
780.3x	8	11	72.7	39.0–94.0	2	5	40.0	5.3–85.3
Both 345.xx and 780.3x	2	5	40.0	5.3–85.3	1	3	33.3	0.8–91.0
Gender
Male	7	9	77.8	40.0–97.2	2	7	28.6	3.7–71.0
Female	4	8	50.0	15.7–84.3	2	5	40.0	5.3–85.3
	≥25 years (n abstracted = 65)				Total (n abstracted = 94)
	Chart-confirmed cases (n)	Charts abstracted (n)	PPV (%)	95% CI	Chart-confirmed cases (n)	Charts abstracted (n)	PPV (%)	95% CI
All visits	21	65	32.3	21.2–45.1	36	94	38.3	28.5–48.9
ICD-9 diagnosis codea
345.xx	6	34	17.6	6.8–34.5	8	39	20.5	9.3–36.5
780.3x	13	24	54.2	32.8–74.5	23	40	57.5	40.9–73.0
Both 345.xx and 780.3x	2	7	28.6	3.7–71.0	5	15	33.3	11.8–61.6
Gender
Male	12	23	52.2	30.6–73.2	21	39	53.8	37.2–69.9
Female	9	42	21.4	10.3–36.8	15	55	27.3	16.1–41.0

Abbreviations: PPV = positive predictive value.

^aCodes included all digits. ICD-9 345.xx = epilepsy, ICD-9 780.3x = convulsions.