Table 3.
Probable missed diagnoses of stroke (misdiagnosed as dizziness or headache) during an ED treat-and-release visit, for adult patients a later admitted for stroke, by type of stroke diagnosed during the inpatient stay, 2009.
| Diagnosis at most recent ED visit for: | Inpatient diagnosis: type of stroke | Total, % | |||
|---|---|---|---|---|---|
|
| |||||
| Transient ischemic attack (TIA) | Acute ischemic stroke (AIS) | Intracerebral hemorrhage (ICH) | Subarachnoid hemorrhage (SAH) | ||
| Dizziness n, % | 184 (19%) | 732 (75%) | 54 (5%) | 7 (1%) | 977(100%) |
| Headache n, % | 218 (17%) | 703 (55%) | 172 (14%) | 173 (14%) | 1266(100%) |
| Total n, % | 402 (18%) | 1435 (64%) | 226(10%) | 180 (8%) | 2243 (100%) |
Emergency department (ED) visits: Agency for Healthcare Research and Quality Clinical Classification Software (CCS) codes—dizziness (codes 93 [dizziness and vertigo] or 94 [other ear conditions]); headache (code 84 [headache]). Inpatient diagnoses of stroke: ICD-9-CM codes—TIA (435.x); ICH (431, 432.x); SAH (430); AIS (any other stroke code listed in Appendix 1 Table).
a
This is a patient-level analysis, so counts only include the most proximate ED visit.