HSSS
Expert
Haven’t looked at this in detail but could that be because glycemic control has typically been achieved by medications and that does little to address hyperinsulemia which causes its own damage. Whereas in more recent times glycemic control might be by means of low carb etc which does address the underlying issue of insulin resistance. Also with the fairly recent and rapid increase in flash and continuous monitors a steady and greater % of time in range would result in better outcomes than a reasonable Hb1ac but comprising of highs and lows perhaps."In type 2 diabetes, the pathogenesis of atherosclerosis-related disease is multifactorial (Betteridge, 2011). Glycaemic control has been consistently shown to prevent microvascular complications. However, large, randomised trials have failed to demonstrate the same consistent beneficial effects of intensive glycaemic control on improving cardiovascular outcomes. Thus, optimal glucose control in isolation is not sufficient to reduce cardiovascular risk" https://www.pcdsociety.org/download/resource/2070
Edited to try and correct link.