CRP and breast cancer: After considering all factors simultaneously in the logistic regression model (c-statistic 0.665; Hosmer-Lemeshow goodness-of-fit statistic 0.612; discordant prediction 20.4%), low general nursing category (odds ratio (OR) 4.2), a CRP rise > 50 mg/L (OR 2.0), and any antibiotic in the previous 7 days (OR 2.0) remained significantly (p < 0.05) associated with OP-negative BC.