抄録
[Objectives] This study aimed to compare inflammatory reaction of blood test between rheumatoid arthritis (RA) and polymyalgia rheumatica (PMR).
[Methods]Clinical information was extracted by chart review. Factors of RA and PMR were analysed by the independent t-test for continuous data or the chi-squared test for categorical data, followed by multivariable logistic regression model analysis.
[Patients or Materials]Participants comprised all inpatients RA and PMR of departments of general medicine between April 1, 2014 and July 31, 2020.
[Results]Fifty-three patients (male:female = 23:30;mean (± standard deviation) age, 74.90 ± 13.93 years) with a final diagnosis of arthralgia were included. PMR (29/53 cases;54.6%) was the most common, followed by RA (14/53 cases;26.4%).Seronegative RA was more frequent than seropositive RA in this study. White blood cell count ( p = 0.01) and neutrophils ( p = 0.01) were significantly different in bivariate logistic regression analysis, but neither white blood cell (odds ratio (OR) 1.00, 95% confidence interval (CI) 0.99-1.00;p = 0.17) nor neutrophils (OR 0.95, 95%CI 0.87-1.05;p = 0.35) showed significant differences in multivari- able regression analyses.
[Conclusions] Differentiating PMR from RA is difficult, at least serologically. General examination and consideration of differential diagnoses are thus important.
