Nation-wide epidemiological study of Japanese patients with rare viral myelopathy using novel registration system (HAM-net)

Table 3 Variation in clinical attributes with history of blood transfusion (n = 380)

Attribute		Transfusion (+) (n = 73, 19.2 %)		Transfusion (-) (n = 307, 80.8 %)		p Value
Sex:	Female	58	(79.5 %)	224	(73.0 %)	0.255
	Male	15	(20.5 %)	83	(27.0 %)	0.255
Age at Onset		50	(39 – 61)	44	(32 – 55)	0.005
Age at Diagnosis		57	(48 – 67)	52	(41 – 61)	0.004
Age (at Present^a)		69	(58 – 74)	63	(56 – 68)	0.001
Diagnosis Delay (Time from Onset to Diagnosis)^b		5	(1 – 12)	5	(1 – 12)	0.730
Disease Duration (Time from Onset to Present^a)^c		16	(8 – 23)	17	(9 – 26)	0.403
OMDS (Range: 0 – 13)		5.0	(5.0 – 7.5)	5.0	(5.0 – 7.0)	0.212
HAQ-DI (Range: 0 – 3)		1.3	(0.9 – 1.9)	1.0	(0.6 – 1.6)	0.022

Data are summarized using the number of subjects (percentage of total subjects) or the median (interquartile range). The full names of the scales and surveys shown are Osame Motor Disability Score (OMDS) and Health Assessment Questionnaire – Disability Index (HAQ-DI). Higher scores indicate more severe disability. The values for time-points are given in years, and scale and survey results are reported as scores
^aPresent is defined as the time of the subject’s initial HAM-net interview
^bTransfusion (+) n = 72, (-) n = 306
^cTransfusion (+) n = 72

ISSN: 1750-1172