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Table 2 Number of patients with at least one lab test performed and claimed among 703,484 initiators of statins and/or ezetimibe using 6, 9, and 12-month confounder assessment periods (CAPs)

From: Supplementing claims data with outpatient laboratory test results to improve confounding adjustment in effectiveness studies of lipid-lowering treatments

  All patients Number (%) of patients with at least 1 lab test performed* Number (%) of patients with at least 1 LDL lab test performed Number (%) of patients with at least 1 LDL lab test performed
6 month CAP 9 month CAP 12 month CAP 6 month CAP 9 month CAP 12 month CAP 6 month CAP 9 month CAP 12 month CAP
N % N % N % N % N % N % N % N % N %
All patients 703,484 481,133 68% 505,161 72% 520,559 74% 421,708 60% 445,205 63% 460,293 65% 121,764 17% 132,358 19% 139,784 20%
DM patients 111,684 89,344 80% 92,185 83% 93,952 84% 74,576 67% 78,598 70% 81,104 73% 76,413 68% 79,932 72% 81,965 73%
RA patients 4,523 3,676 81% 3,774 83% 3,840 85% 2,650 59% 2,813 62% 2,915 64% 839 19% 918 20% 984 22%
  1. * All tests = any of a set of 23 different frequently-performed laboratory tests recorded in study database.