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The Landscape of Inappropriate Laboratory Testing: A 15-Year Meta-Analysis

Figure 2

Histograms of Study Measures of Inappropriate Laboratory Test Utilization, 1997–2012.

Cumulative distributions of A, overutilization vs. underutilization (P<0.001); B, overutilization, initial vs. repeat testing (P<0.001); C, overutilization, restrictive vs. permissive criteria (P<0.001); and D, overutilization, subjective vs. objective criteria (P = 0.027). Each curve can be interpreted as the probability (y-axis) that a test was at least as inappropriate as indicated on the x-axis. For example in panel B, a third of study measures of initial testing (open arrowhead, y-axis) found at least 60% inappropriateness (closed arrowhead, x-axis).

Figure 2