TNF and Alzheimer disease: Out of the 382 subjects with available measurements, IL-6 was below the detection limit for 106 subjects, namely 27 (33.8%) NCI, 50 (31.3%) CIND, 21 (18.6%) AD, and 8 (25.8%) VaD, while TNF was below the detection limit for 3 subjects, namely 2 (2.5%) NCI and 1 (0.6%) CIND.