Slide 1

Dr Ali Tompkins,ST6 East and North Herts Hospitals Sensitivity of Computed Tomography Performed Within Six Hours of Onset of Headache for Diagnosis of Subarachnoid Haemorrhage: Prospective Cohort Study BMJ 2011;343:d4277

Slide 2

1. Summarise this paper in no more than 200 words (7) TODSPICORC Title Objectives Design Setting Participants/population Intervention or Index test Comparison or Reference test Outcome Results Conclusion

Slide 3

1. Summarise this paper in no more than 200 words (7) Objectives: To determine the sensitivity of modern computed tomography for identifying subarachnoid haemorrhage in neurologically intact patients with acute headache especially when scans are performed within 6 hours. Design: Prospective cohort study over 9 years.

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Setting: Multi-centre: Emergency departments of 11 university- affiliated tertiary care teaching hospitals in Canada Population: Patients >15years GCS 15 Non-traumatic acute (reaching maximal severity