Wound healing and poor bone healing are complications seen in patients who smoke and some surgeons prefer not to operate on smokers. However, self reporting of smoking by patients may be biased. This study compares self-reporting of smoking habits and cotinine levels in the urine of our patients. 77 patients admitted for an osteotomy or arthrodesis procedure between September 2013 and May 2014 agreed to participate in this study. A questionnaire was completed and a urine sample was obtained and tested for cotinine, a metabolite of nicotine, by 2 techniques: a dipstick, the COT One Step Cotinine Test, yielding a positive result when the cotinine in the urine exceeds 200 ng/mL and the Concateno laboratory assay test, providing a mean value to give a qualitative reading whereby the cut off for non-smokers is 500ng/ml.Introduction:
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