Table 2.

Operation data and numbers of laminotomies in the BMI groups

BMI	<25	25–30	≥30	Number of patients (n)
Duration (min)	156.8 ± 41.6	186.2 ± 67.8	205.4 ± 76.0	72
Blood loss (ml)	165.4 ± 306.5	284.4 ± 375.1	169.8 ± 175.0	72
Number of segments	1.9 ± 0.8	2.3 ± 1.4	2.2 ± 1.1	72
Cages	1.8 ± 0.8	1.6 ± 1.2	2.1 ± 1.2	72
Drainage (ml)	165.6 ± 246.8	150.4 ± 125.6	152.0 ± 141.5	72
No laminotomy	15	9	9	33
1 level laminotomy	1	9	7	17
2 or 3 level laminotomy	4	7	11	22
Hospital discharge (days)	8.4 ± 2.17	11.2 ± 8.67	10.7 ± 3.51	71