Un mesur sydd wedi achosi cryn ddryswch ymhlith y cyhoedd yw’r mynegai marwolaethau wedi’i addasu yn ôl risg (RAMI), a gyfrifir yng Nghymru gan gwmni allanol ar gyfer ysbytai cyffredinol dosbarth unigol. A bod yn benodol, bu ansicrwydd eang ymhlith arbenigwyr a’r cyhoedd, ac mae’r ansicrwydd hwn yn parhau, ynghylch i ba raddau y gall ffigur unigol gyfleu ansawdd y gofal sy’n cael ei ddarparu gan yr ystod eang o wasanaethau mewn ysbyty.
One measure which has caused particular public confusion is the risk adjusted mortality index (RAMI), which in Wales is calculated by an external company for individual district general hospitals. To be specific, there has been – and continues to be - widespread uncertainty among experts and the public, about the extent to which a single figure can indicate the quality of care delivered by the wide and complex range of services within a hospital.