Binary multiple logistic regression analysis showed that RA was significantly and independently associated with OP [odds ratio (OR): 1.6627, 95% confidence interval (95% CI) = 1.1417–2.3604, P = 5.94E−03] and high-sensitivity CRP (hsCRP) (OR: 1.211, 95% CI = 1.0271–1.2082, P = 4.95E−03) regardless of age and body mass index (BMI) (Table 1). Here, CRP is linked to rheumatoid arthritis.