Figure 2.

The risk of lung transplantation (LTx) was linearly related to the risk of death without LTx, which generated a slope that was equivalent to the LTx-to-death ratio (higher is favorable) for individuals with cystic fibrosis and FEV₁ < 40% predicted: A, in Canada; B, in the United States; C, for patients with Medicaid/Medicare in the United States; D, patients with “Other” insurance (primarily private health insurance) in the United States. With a slope of 1.0 (dotted reference line), LTx and death without LTx occur at the same rate; a slope greater than 1.0 means LTx occurs more often than death without LTx and a slope less than 1.0 means death without LTx occurs more often than LTx. CAN = Canada; M/M = Medicaid/Medicare; US = United States.