Rule Aids in Subarachnoid Bleed Diagnosis

But is it possible to have a completely objective diagnosis without the need for specialized knowledge? Like maybe one of these 17 ways.
Do you people ever use your brains at all?
http://www.medpagetoday.com/EmergencyMedicine/EmergencyMedicine/41837?
A highly sensitive clinical decision rule -- dubbed the Ottawa Subarachnoid Hemorrhage, Ottawa SAH, rule -- has been developed to help clinicians diagnose subarachnoid hemorrhage, a group of Canadian researchers reported.
The rule, which specifies that patients with any one of six clinical features should undergo diagnostic testing beginning with a CT scan of the head and, if necessary, a lumbar puncture, had a sensitivity of 100% (95% CI 97.2-100) and a specificity of 15.3% (95% CI 13.8-16.9), according to Jeffrey J. Perry, MD, of Ottawa Hospital in Ontario, and colleagues.
The features included in the rule were age 40 or higher, thunderclap headache, pain or stiffness in the neck, limited neck flexion, a witnessed loss of consciousness, and onset during exertion, Perry and colleagues reported in the Sept. 25 issue of the Journal of the American Medical Association.

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