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Prevalence of medical comorbidities and SSI by age group. * = statistically significant trends with increasing age group with p<.05; *** = statistically significant trends with increasing age group with p<.001; **** = statistically significant trends with increasing age group with p<.00001. SSI, surgical site infection; CKD, chronic kidney disease; DM, diabetes mellitus; SCI, spinal cord injury; HIV, human immunodeficiency virus; IV, intravenous; IVDU, intravenous drug user.
