Table 1 Demographic characteristics of individuals with SCI in 1993 (N=344)

Variables	All (N=344)		C1–C4 (N=50; 15%)		C5–C8 (N=126; 37%)		T1–S5 (N=168; 49%)		P-value
	n	%	n	%	n	%	n	%
Gender									0.13
Male	231	67	36	16	91	39	104	45
Female	113	33	14	12	35	31	64	57
Race									0.58
American Indian/Alaskan Native	5	2	0	0	2	40	3	60
Asian	2	1	0	0	1	50	1	50
Black or African American	56	16	5	9	18	32	33	59
White	281	82	45	16	105	37	131	47
Hispanic origin									0.61
Yes	1	0	0	0	0	0	1	100
No	315	92	47	15	110	35	158	50
Missing	28	8	3	11	16	57	9	32
Marital status									0.15
Single	141	41	21	15	58	41	62	44
Married	131	38	21	16	37	28	73	56
Divorced	49	14	4	8	18	37	27	55
Others	23	7	4	17	13	57	6	26
	Mean	s.d.	Mean	s.d.	Mean	s.d.	Mean	s.d.
Age (range: 17–66 years old)	37.0	10.6	34.9	12.4	36.1	9.9	38.2	10.5	0.06
Education (year)	14.5	2.9	13.8	3.1	14.4	2.9	14.7	2.8	0.17
General health score	3.3	1.0	3.2	0.9	3.3	1.0	3.3	1.0	0.81
SCI_ADL raw score^a	17.2	6.8	22.8	8.7	20.2	6.4	13.2	3.1	<0.001^b

Abbreviations: Min, minimum of age; max, maximum of age; SCI, spinal cord injury; SCI_ADL, Spinal Cord Injury Activities of Daily Living.
SCI injury level: cervical, C1–C4; cervical, C5–C8; thoracic, lumbar, sacral, T1–S5.
^aSignificant at P-value of 0.05
^bLower raw SCI_ADL score means more independent.

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