Table 3.
Number of, and reasons that contributed to, FP and FN results
| Subjects | n (%) | Reasons that contributed to FP or FN results |
| FP | ||
| T2DM subjects | 27 (100) | Incomplete data for T1DM diagnosis |
| Non-DM subjects | 73 (34) | Incomplete data for DM-relevant diagnosis |
| 7 (3) | Incomplete use history of antidiabetes medication or supplies | |
| 135 (63) | Absence of laboratory results | |
| FN | ||
| T2DM subjects | 53 (21) | <2 visits at Mayo Clinic between January 1, 2006 and December 31, 2007 |
| 111 (44) | Incomplete data for T2DM diagnosis | |
| 75 (30) | Incomplete treatment history of antidiabetes medication or supplies | |
| 13 (5) | Absence of laboratory results | |
| Non-DM subjects | 499 (32) | <2 visits at Mayo Clinic between January 1, 2006 and December 31, 2007 |
| 1074 (68) | Absence of laboratory results | |
DM, diabetes mellitus; FN, false negative; FP, false positive; T1DM, type 1 diabetes mellitus; T2DM, type 2 diabetes mellitus.