TABLE 3

Number of Patients With Diagnostic Tests at Index Visit

Diagnostic RestNo SNND (Total n = 121 013), n (%)Has SNND (Total n = 608), n (%)P
Any neuroimaginga 19 344 (16.0) 152 (25.0) <.001 
 CT 15 678 (13.0) 117 (19.2) <.001 
 MRI 3898 (3.2) 37 (6.1) <.001 
Blood tests 22 862 (18.9) 205 (33.7) <.001 
CSF studies 696 (0.6) 17 (2.8) <.001 
EEG 80 (0.1) 0 (0.0) .53 
Diagnostic RestNo SNND (Total n = 121 013), n (%)Has SNND (Total n = 608), n (%)P
Any neuroimaginga 19 344 (16.0) 152 (25.0) <.001 
 CT 15 678 (13.0) 117 (19.2) <.001 
 MRI 3898 (3.2) 37 (6.1) <.001 
Blood tests 22 862 (18.9) 205 (33.7) <.001 
CSF studies 696 (0.6) 17 (2.8) <.001 
EEG 80 (0.1) 0 (0.0) .53 
a

Some patients underwent both CT and MRI.

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