Table 2.

Percentage of Individuals with Neurological Complete Spinal Cord Injury (AIS A) Who Convert to Incomplete Status during the First Post-Injury Year (Heterogeneous Sample Including Tetraplegia and Paraplegia)

Authors/year	Neurological level of injury	Initial exam	Follow-up exam	Sample size (N)	Overall conversion (%)	AIS A to B (%)	AIS A to C or D (%)
8Marino et al. 1999a	All levels	≤7 days	1 y	482	15.4	7.3	8.1
47Burns et al. 2003	All levels	≤48 h	1 y	53	11.3	5.7	5.7
56Fawcett et al. 2007a,b,c	Cervical and thoracic	≤30 d	1 y	NR	20	10	10
20Spiess et al. 2009b	All levels	≤15 d	1 y	139	30.2	17.3	13
	Above T10			62	24.2	12.9	11.2
48van Middendorp et al. 2009b	Above T11	≤15 d	6 m – 1 y	161	26.1	14.3	11.8
21Kirshblum et al. 2016a	All levels	≤30 d	1 y	187	27.8	10.7	17.1

AIS, American Spinal Injury Association Impairment Scale; NR, not reported;

^aSpinal Cord Injury Model Systems database.

^bEuropean Multicenter Study about Spinal Cord Injury database.

^cSygen database.