Table 3. Univariable meta-regression for permanent spinal cord injury.

Variable	Regression coefficient (beta) ± SD	P value
Study period	0.002±0.011	0.86
Publication year	0.011±0.017	0.54
Hospital volume	−0.0001±0.0004	0.74
Age	0.014±0.008	0.08
Male gender	−0.003±0.005	0.56
Coronary artery disease	0.004±0.005	0.412
Diabetes	0.008±0.010	0.45
Chronic renal failure	0.008±0.005	0.10
Chronic obstructive pulmonary disease	−0.002±0.001	0.11
Acute dissection	−0.004±0.003	0.16
Chronic/subacute dissection	0.008±0.004	0.10
DTA repair percent	−0.009±0.005	0.05*
Endovascular repair (vs. open)	−0.336±0.138	0.02*
Clamp-and-sew technique	−0.020±0.010	0.04*
Circulatory arrest	−0.002±0.006	0.75
Left heart bypass	0.007±0.004	0.13
Cerebrospinal fluid drain use	0.004±0.003	0.12

*, significant results. SD, standard deviation; DTA, descending thoracic aneurysm.