Association of circulating levels of MMP-8 with mortality from respiratory disease in patients with rheumatoid arthritis

Table 2 Circulating baseline levels of metalloproteinases (MMPs) in surviving and non-surviving rheumatoid arthritis patients

	Survivors	Non survivors by major causes of death
		All causes	Circulatory disease	Neoplastic disease	Respiratory disease
Number	283	204	94	49	42
MMP-1	3.35	3.60	3.42	2.52	4.93
MMP-2	129.09	141.11	150.08	137.51	139.73
MMP-3	23.22	27.42	25.63	27.89	27.42
MMP-8	20.03	20.50	18.67	18.55	25.16*
MMP-9	384.81	375.82	377.44	386.38	449.75

Serum levels of MMPs (ng/ml) are medians.*P (adjusted for age, sex and disease duration) = 0.01 (compared with surviving patients).

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