TABLE 1.

Study population characteristics

Characteristic	Value
No. of subjects	80
Mayo Clinic	53
Mayo Clinic Laboratories	27
Mean age (yr) of subjects (range)	48 (11–85)
Mayo Clinic patients	49 (11–81)
Mayo Clinic Laboratories subjects	46 (11–85)
No. of female subjects (%)	38 (48)
Mayo Clinic patients	22 (42)
Mayo Clinic Laboratories subjects	16 (59)
No. of Mayo Clinic patients (%)
Duration of symptoms
Acute (≤3 wks)	9 (17)
Subacute (>3 wks but ≤3 mo)	17 (32)
Chronic (>3 mo)	27 (51)
Inpatient	25 (47)
Evaluated elsewhere without definitive diagnosis	33 (62)
Initiation or escalation of immunotherapy planned at time of ordering	27 (51)
Result altered treatment	2 (4)