“…The total number of adults with DS studied was large ( N = 1,561), but only three studies utilized controls. Thirteen of the studies used a cohort or case series design (lll), while three used a case‐control design (ll‐2) (Alvarez & Rubin, ; Burke, French, & Roberts, ; Cooke & Lansdall‐Welfare, ; El‐Khouri et al, ; Elliott, Morton, & Whitelaw, ; Ferguson et al, ; French, Burke, Roberts, Whitecloud, & Edmunds, ; MacLachlan et al, ; Miller, Capusten, & Lampard, ; Miller, Grace, & Lampard, ; Morton, Khan, Murray‐Leslie, & Elliott, ; Pueschel et al, ; Pueschel, Scola, & Pezzullo, ; Roy, Baxter, & Roy, ; Tangerud, Hestnes, Sand, & Sunndalsfoll, ; Van Dyke & Gahagan, ) (Table ).…”