Spinal fusion is an aerosol generating procedure

Table 1 Logistic regression analysis of surgical steps of interest for 0.3-0.5 μm/m³ particle counts

Variable	OR	Lower 95%	Upper 95%	Z score	P value
Bovie	10.20	7.80	13.30	16.80	< 0.001
Burring	10.90	6.60	18.00	9.40	< 0.001
Drilling	0.50	0.20	1.10	-1.70	0.099
Bone scalpel	5.90	3.20	10.90	5.70	< 0.001
Max in room	1.40	0.90	2.00	1.60	0.116
Sensor distance	0.03	0.01	0.10	-4.70	< 0.001

OR: Odds ratios.