MMP7 and polymyositis: Moreover, Nakatsuka et al. studied 52 patients with polymyositis/dermatomyositis-ILD, and showed that higher levels of serum MMP-7 were associated with 6-month mortality (odds ratio [OR] = 1.57, 95% CI 1.01–2.45, P = 0.046) using univariate logistic regression analysis, and that high serum MMP-7 (> 5.08 ng/mL) was associated with a worse prognosis (OR = 14.60, 95% CI 1.11–192.00, P = 0.027) when using multivariable logistic regression analysis adjusted by hypoxia and serum ferritin levels29.