Good point. Also, noted in that 39. the word total with no comment of the proportion of good and bad cholesterol. This is the link in that 39.
May 24, 2005; 64 (10) Articles High total cholesterol levels in late life associated with a reduced risk of dementia M. M. Mielke, P. P. Zandi, M. Sjögren, D. Gustafson, S. Östling, B. Steen, I. Skoog First published April 20, 2005, https://n.neurology.org/content/64/10/1689