. Author manuscript; available in PMC: 2015 Oct 15.

Published in final edited form as: Spine (Phila Pa 1976). 2014 Oct 15;39(22):1910–1916. doi: 10.1097/BRS.0000000000000558

Table 4.

Association of microscope use with infection rates in elective spine surgery patients.

	Without microscope		With microscope		Bivariate logistic regression		Multivariate logistic regression^*

	Number	Percent	Number	Percent	OR	p	OR	p
Any infection	307	1.4%	21	0.9%	0.7	0.063	0.7	0.191
Superficial surgical site infection	152	0.7%	11	0.5%	0.7	0.246	0.7	0.344
Deep surgical site infection	73	0.3%	5	0.2%	0.7	0.368	0.8	0.578
Organ space infection	25	0.1%	3	0.1%	1.2	0.812	1.3	0.714
Sepsis/septic shock	85	0.4%	7	0.3%	0.8	0.555	1.0	0.971

Each line represents a separate multivariate analysis for each variable in order to give an adjusted OR and p-value by controlling for all demographics, comorbidities, and operative characteristics found in Table 1 and Table 2.