Table 1:

Patient characteristics and additional procedures

	No. (%)
No.	53
Mean (SD) age	65.0 (10.8)
No. (%) male	43 (81.1)
Mean delay in diagnosis (mo)	9.2 ± 11.1
Symptoms at presentation
Bilateral motor symptoms	48 (90.6)
Sensory symptoms	20 (37.7)
Bowel or bladder symptoms	13 (24.5)
Focal unilateral motor deficit	3 (5.7)
Initial working diagnosis
Spinal stenosis	13 (24.5)
Myelopathy NOS	10 (18.9)
Transverse myelitis	9 (17.0)
Ischemic myelopathy	4 (7.6)
Peripheral neuropathy	3 (5.7)
Myopathy	2 (3.8)
NMO	2 (3.8)
CIDP	2 (3.8)
Other	8 (15.1)
Additional interventions
Systemic steroids	18 (34.0)
IVIG	5 (9.4)
Surgery	6 (11.3)
Biopsy	2 (3.8)
Plasma exchange	4 (7.6)
Rituximab	2 (3.8)
No. of additional spine MRIs or CTs until diagnosis
1	10 (18.9)
2	8 (15.1)
3	12 (22.6)
4	12 (22.6)
≥5	11 (20.8)

Note:—NOS indicates not otherwise specified; NMO, neuromyelitis optica; CIDP, chronic inflammatory demyelinating polyneuropathy.