Table 1.

Demographics, pre-existing conditions and comorbidities in the study population

BMI	<25	25–30	≥30	Total
Number of patients	20 (27.8%)	25 (34.7%)	27 (37.5%)	100 (100%)
Prior spinal surgery	9	3	2	14
Hypertension	4	12	17	33
Hypothyroidism	0	2	8	10
Hepatic steatosis/hepatopathy/goiter	1	2	2	5
Coronary artery disease	1	1	2	4
Atrial fibrillation	0	1	1	2
Cardiomyopathy	0	2	0	2
Diabetes mellitus, type I	0	0	1	1

BMI < 25 (normal weight), BMI 25–30 (overweight) and BMI ≥ 30 (obese)