Distribution of Larsen scores at 5 years in all subjects () and in subjects with erosions (), according to baseline antibody status in the prospective cohort

Values are presented as box and whisker plots, where the boxes represent the interquartile range, the lines within the boxes represent the median Larsen score, the whiskers represent the range from the smallest to the largest score, and the circles represent outliers. 1 represents subjects who were RF+ and anti-CCP+ ( &lt; 0.0001 versus subjects who were RF− and anti-CCP−, both in the total group and in the group with erosions). 2 represents subjects who were RF− and anti-CCP+ ( &lt; versus subjects who were RF− and anti-CCP− in the total group and = 0.0001 versus subjects who were RF− and anti-CCP− in the group with erosions). 3 represents subjects who were RF+ and anti-CCP− ( = 0.90 versus subjects who were RF− and anti-CCP− in the total group and = 0.85 versus subjects who were RF− and anti-CCP− in the group with erosions). 4 represents subjects who were RF− and anti-CCP− (referent).<b>Copyright information:</b>Taken from "The performance of anti–cyclic citrullinated peptide antibodies in predicting the severity of radiologic damage in inflammatory polyarthritis: Results from the Norfolk Arthritis Register"Arthritis and Rheumatism 2007;56(9):2929-2935.Published online Jan 2007PMCID:PMC2435419.Copyright © 2007 American College of Rheumatology