Organizing Pneumonia Preceding Rheumatoid Arthritis

Table 1

Characteristics and outcome of seven patients reported in literatures.

Reference	Sex, Age	Autoantibodies		Therapy (PSL)	Interval^†, mo	Response/Relapse
		RF*	CCP
[7]	F, 69	N.A.	N.A.	1 mg/kg	8	Improved/Yes
[7]	F, 33	Positive	N.A.	40 mg	3	Improved/No
[8]	F, 68	1 : 640	N.A.	60 mg	0.5	Improved/No
[9]	F, 86	1 : 160	50.8 U/mL	pulse only	11	Improved/No
[10]	M, 71	159 U/mL	>100 U/mL	30 mg	0.6	Improved/No
[11]	M, 65	Negative	N.A.	80 mg	6	Partial response/No
Present case	M, 58	69 U/mL	50.5 U/mL	40 mg	24	Improved/No

RF: rheumatoid factor, CCP: anticyclic citrullinated peptide antibody, N.A.: not available, PSL: prednisone.
∗RF by latex fixation (positive/negative), the concentration of rheumatoid arthritis particle agglutination (normal value, <1 : 40), or quantitation of RF (normal value, <15 U/mL).
†The interval from prodromal respiratory symptoms to joint manifestations.