Figure 1
From: A comparison of alternative selection methods for reporting spirometric parameters in healthy adults
Heat map diagram illustrating the minimum and maximum forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) vs. trial outcome (accept/not accept) for each visit and subject. Data are displayed across the vertical axis for each individual subject. The outcomes for every subject’s attempted trial (accepted vs. not accepted) are represented by the black and grey boxes with trial number indicated on the horizontal axis. The absolute maximum and minimum value for each subject’s FEV1 and FVC measurement are indicated with a red and blue marker, respectively.
