We　first　show　that　the　infimum　coverage　probability　of　a　commonly　used　asymptotic　confidence　interval　for　the　odds　ratio　is　much　less　than　the　nominal　level　and　then　propose　three　exact　intervals,　which　are　also　valid　under　mixed-effect　models.　(C)　2017　Elsevier　B.V.　All　rights　reserved.