Table 1.

Baseline characteristics

	N = 1778	%
Age, years (mean, SD)
Sex (n, %)
Male	960	54.0
Female	818	46.0
Non-Elective	163	9.2
Elective	1615	90.8
Spinal
Degenerative	1396	78.5
Tumor	234	13.2
Trauma	47	2.6
Infection	101	5.7

SD, standard deviation