Table 2.

Distribution of inflammatory markers and positive prevalence.

	RA with Complications
	RA Flare, n = 18	Noninfectious Complications, n = 23	Nonbacterial Infections, n = 15	Bacterial Infections, n = 62	p^†
PCT, ng/ml, median (IQR)	0.1 (0.1, 0.1)	0.1 (0.1, 0.1)	0.1 (0.1, 0.1)	0.1 (0.1, 0.5)	0.008
≥ 0.2 ng/ml, n (% [95% CI^*])	0 (0.0 [0.0–18.5])	4 (17.4 [5.0–38.8])	2 (13.3 [1.7–40.5])	21 (33.9 [22.3–47.0])	0.013
≥ 0.5 ng/ml, n (% [95% CI^*])	0 (0.0 [0.0–18.5])	1 (4.3 [0.1–21.9])	0 (0.0 [0.0–21.8])	16 (25.8 [15.5–38.5])	0.003
CRP, mg/dl, median (IQR)	4.4 (2.75, 10.00)	5.7 (2.80, 9.90)	8.7 (1.85, 11.90)	9.4 (4.45, 14.90)	0.084
≥ 0.3 mg/dl, n (% [95% CI^*])	18 (100.0 [81.5–100.0])	21 (91.3 [72.0–99.0])	14 (93.3 [68.1–99.8])	60 (96.8 [88.8–99.6])	0.513
WBC, /mm³, median (IQR)	8500 (6200, 9650)	7900 (6700, 10,600)	7500 (5450, 13,350)	10,700 (7800, 14,800)	0.003
> 8500/mm³, n (% [95% CI^*])	7 (38.9 [17.3–64.3])	9 (39.1 [19.7–61.5])	7 (46.7 [21.3–73.4])	41 (66.1 [53.0–77.7])	0.053
ESR, mm/h, median (IQR)	70 (61, 97.5)	83 (50, 96)	67 (35, 90.5)	57 (40, 86)	0.296
≥ 15 mm/h n (% [95% CI^*])	15 (83.3 [58.6–96.4])	18 (78.3 [56.3–92.5])	8 (53.3 [26.6–78.7])	53 (85.5 [74.2–93.1])	0.328

↵* Binomial distribution.
↵† Kruskal-Wallis test for distribution of inflammatory markers and chi-square test for prevalence. IQR: interquartile range; PCT: serum procalcitonin; CRP: C-reactive protein; WBC: white blood cell count; ESR: erythrocyte sedimentation rate; RA: rheumatoid arthritis.