Figure 2:

Fibrin and neutrophils associate with duration of morning stiffness

Percent of patients with more than one hour of morning stiffness according to presence of synovial fibrin (A) and neutrophils (B). P values represent results of Fisher’s exact tests, using the Bonferroni correction to account for multiple comparisons. C. Percentages of patients with more than one hour of morning stiffness according to having synovium with neither fibrin nor neutrophils, fibrin only, neutrophils only, or both fibrin and neutrophils. P values represent results of Cochran-Armitage trend test. D. Severity of stiffness according to presence of neutrophils and fibrin. P values represent results of Mann-Whitney tests.