A solid line of best fit and associated correlation coefficient are shown, as well as dashed line showing the ideal fit. Labels in four quadrants show the relative proportions of true positive (TP), false positive (FP), true negative (TN), and false negative (FN) events based on an FVC and MIP thresholds of 50% and −60 cm water. From Geronimo A, Simmons Z. Evaluation of remote pulmonary function testing in motor neuron disease. Amyotroph Lateral Scler Frontotemporal Degener 2019; 20:348–355, reprinted by permission of the publisher (Taylor & Francis Ltd, http://www.tandfonline.com).