Table 4.

Multivariable multinomial analysis coefficients and odds ratios for predictors of surgical site infection. Procedure categories (n = 15) and MSA (n = 393) were included in analysis but omitted from the table. Years are measured from 2007 up to 2014. Adjusted p-values were derived using Holm’s method.

	SSI during admission				SSI after discharge
	B (SE)	OR (95% CI)	p	Adjusted p	B (SE)	OR (95% CI)	p	Adjusted p
Sex (1 = female)	− 0.14 (0.14)	0.87 (0.84–0.90)	< 0.001	< 0.001	0.032 (0.008)	1.03 (1.01–1.05)	< 0.001	< 0.001
Medicare	− 0.4 (0.018)	0.67 (0.64–0.69)	< 0.001	< 0.001	− 0.31 (0.01)	0.73 (0.72–0.75)	< 0.001	< 0.001
Inpatient	2.98 (0.031)	19.7 (18.5–20.9)	< 0.001	< 0.001	0.54 (0.009)	1.72 (1.68–1.75)	< 0.001	< 0.001
Charlson comorbidity index	0.054 (0.002)	1.06 (1.05–1.06)	< 0.001	< 0.001	0.068 (0.001)	1.07 (1.07–1.07)	< 0.001	< 0.001
Length of stay	0.028 (0.0004)	1.03(1.03–1.03)	< 0.001	< 0.001	0.015 (0.0004)	1.02 (1.01–1.02)	< 0.001	< 0.001
Years	− 0.039 (0.003)	0.96 (0.96–0.97)	< 0.001	< 0.001	− 0.029 (0.002)	0.97 (0.97–0.97)	< 0.001	< 0.001
Maximum daily precipitation (cm/day)	0.002 (0.004)	1.002 (0.99–1.01)	0.65	0.065	0.009 (0.002)	1.009 (1.006–1.013)	< 0.001	< 0.001
Maximum daily specific humidity (g/kg)	− 0.008 (0.004)	0.99 (0.99–1.0)	0.037	0.07	0.026 (0.002)	1.03 (1.02–1.03)	< 0.001	< 0.001
Minimum daily minimum temperature (°C)	0.0042 (0.0015)	1.004 (1.001–1.007)	0.004	0.01	− 0.005 (0.0007)	0.995 (0.99–1.00)	< 0.001	< 0.001