Under missing at random assumptions , some sensitivity analyses found no difference between either treatment armand placebo , while some sensitivity analyses found a significant difference from baseline to week 8 between sertraline and placebo ( -1.28 , 95 % credible interval [ -2.48 ; -0.08 ] ) , but not between hypericum and placebo ( 0.56 , [ -0.64 ; 1.76 ] ) .