“…[20, 39, 56, 62] Thirty four studies were published after 2010. [4, 20, 22, 29-31, 34-38, 40, 41, 43-46, 50-61, 63-67] All 49 studies reported age and gender, but comorbidities were less consistently described, with 37 (76%) studies reporting the prevalence of diabetes mellitus, [4, 20-25, 27, 28, 30-37, 40, 41, 43, 45-56, 58, 61, 65-67] 31 (63%) reporting ischaemic heart disease(IHD), [4, 20-28, 30, 32, 34-37, 41, 43, 45, 47-50, 52-56, 61, 65, 67] 21 (43%) reporting smoking status,[23, 25, 30, 32-36, 40-42, 46-49, 51, 53, 67] and 15 studies (31%) reporting all three comorbidities [32,35,36,45,47,49,52,61,65,[68][69][70][71][72][73].…”