Influence of perioperative complication severity on 1- and 2-year outcomes of low back surgery

Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 4 Comparative analyses of disability and pain by Clavien−Dindo classification at 1 and 2 years (30% difference)

Variables	Odds ratio (95% confidence interval)	P value
Unadjusted oswestry disability score
Grade I–II Clavien–Dindo classification (year 1)	0.98 (0.54, 1.80)	0.96
Grade I–II Clavien–Dindo classification (year 2)	2.13 (1.01, 4.52)	0.04
Adjusted Oswestry Disability Score^a
Grade I–II Clavien–Dindo classification (year 1)	1.13 (0.57, 2.21)	0.72
Grade I–II Clavien–Dindo classification (year 2)	1.74 (0.73, 4.19)	0.21
Unadjusted visual analog scale for pain
Grade I–II Clavien–Dindo classification (year 1)	0.97 (0.52, 1.81)	0.93
Grade I–II Clavien–Dindo classification (year 2)	2.88 (1.08, 7.66)	0.03
Adjusted visual analog scale for pain^a
Grade I–II Clavien–Dindo classification (year 1)	0.91 (0.45, 1.82)	0.78
Grade I–II Clavien–Dindo classification (year 2)	2.23 (0.78, 6.36)	0.13

Bold numbers indicates significant difference
^aControl variables include gender, number of spinal levels, disability score at baseline, and SF-36 physical and mental component summary scores