Table 2.

Baseline demographics and surgical characteristics of the population.

Baseline Demographics
	Non-Cutibacterium n = 384	Cutibacterium spp. n = 27	p -Value
Age	57.5 (17.9)	42.2 (22.9)	0.001
Median age and IQR	61.4 (47.0–71.5)	38.0 (19.1–61.1)	0.006
BMI	28.6 (6.2)	25.9 (5.1)	0.05
Gender (female)	212 (55.2%)	10 (37.0%)	0.067
Corticoid treatment	23 (6.0%)	0 (0%)	0.191
Previous surgery	23 (7.3%)	4 (4.2%)	0.278
Charlson comorbidity index = 0	191 (50.8%)	21 (77.8%)	0.007
ASA=>2	352 (94.9%)	18 (66.7%)	0.001
Surgical Characteristics
	Non-Cutibacterium n = 384	Cutibacterium spp. n = 27	p -Value
Emergency vs. elective	37 (9.7%)	2 (5.1%)	0.697
Fusion > 6 segments	65 (17.6%)	9 (33.3%)	0.043
Number of fused segments	4.09 (3.5)	5.07 (3.7)	0.164
Surgical time	242.9 (124.6)	237.1 (124.0)	0.84
Cervical	31 (8.1%)	4 (11.4%)	0.225
Thoracic	135 (35.2%)	10 (37.0%)	0.843
Lumbar	321 (83.6%)	21 (77.8%)	0.434

Numerical variables are expressed with mean values and standard deviations and categorical variables with number of cases and percentages. IQR = interquartile range, ASA = American Society of Anaesthesiologists. The ASA (American Society of Anaesthesiology) index is intended to assess a patient’s preanesthetic medical comorbidities. Its values range from 1 to 5; patients with a score of 1 are considered healthy. The Charlson Comorbidity Index (CCI) predicts 10-year mortality based on the presence of comorbidities. It is widely used as a marker to measure health status. Patients with a value of 0 are younger than 50 and have no comorbidities.