Table 3.

Comparison of baseline clinical and biochemical features between MRI-negative lupus myelitis and MRI-negative myelopathy due to other etiologies.

Parameters		MRI-negative lupus myelitis (n = 8)	MRI-negative myelopathy due to other etiologies (n = 14)	P -value
1. Gender (Male: Female)		1:7	8:6
2. Mean age at onset of myelopathy (years)		30.0 ± 8.93 (median, 28.0; range, 21.25– 37.0)	30.0 ± 12.05 (median, 28.0; range, 19.75– 36.0)	1.000
3. Time to nadir (days)		34.3 ± 32.42 (median, 20.5; range, 8.75– 67.75)	6.8 ± 12.74 (median, 1.0; range, 0.5– 5.75)	0.010
4. Selective tract involvement		62.5%	28.6%	0.187
5. Other central or peripheral nervous system involved		75%	21.4%	0.026
6. Previous episodes of neurological manifestation		Nil	Nil
7. CSF analysis	(a) Pleocytosis	50%	57.1%	1.000
	(b) Elevated protein	84.9 ± 41.23 mg/dL (median, 65.0; range, 57.25–128.75)	54.6 ± 10.56 mg/dL (median, 54.5; range, 48.75–61.0)	0.016