Koo,

 "what does the (44) in the above represent?"

That is just a reference in the paper for "Nasreddine ZS, Phillips NA, Bedirian V, Charbonneau S, Whitehead V, Collin I, et al. The Montreal Cognitive Assessment, MoCA: a brief screening tool for mild cognitive impairment. J Am Geriatr Soc. 2005;53(4):695-9."

"do we know the total number of patients that took part in the MoCA trial and how many of which score <25?"

469 patients 70 years or older make up the cognition subgroup. At baseline MoCA screening, 223 had score of greater than 25; 246 had score of 25 or below. Of these 246, 97 had score below 22. 

https://www.resverlogix.com/upload/media_element/173/b9738b92dd21/2019-07-08---aaic-poster-2019-final.pdf

https://www.resverlogix.com/upload/event/42/4388386bbd26/2019-03-29---ad-pd-2019-cummings-final.pdf

https://www.resverlogix.com/upload/media_element/201/29edd8d7b752/aha-poster-2019.pdf

"In the executive Summary (1), what does the  "0.65-1.04" represent? .... "Executive Summary (1)•Very Encouraging Cardiovascular Disease Efficacy Results–Narrow Miss on Primary: 18% HazardReduction(95% CI; 0.65-1.04) p=0.11""

I think that is the confidence interval. I am far from a statistician, so I will let someone else elaborate on this if they choose to do so.

BearDownAZ