Dylid pwyllo cyn dod i gasgliadau am yr anghysondeb ymddangosiadol rhwng casgliadau ymchwiliad y Gwasanaeth Cynghori ar Iechyd a Gofal Cymdeithasol a rhai adroddiadau a chanfyddiadau cynharach. Roedd yr adroddiadau hynny yn canolbwyntio ar gohortau o gleifion llai o faint. Nid oedd gan yr awduron fynediad at y set gynhwysfawr iawn o ddogfennau (gan gynnwys cofnodion clinigol) a thystiolaeth arall a archwiliwyd fel rhan o ymchwiliadau'r Gwasanaeth Cynghori ar Iechyd a Gofal Cymdeithasol, ac nid oeddynt ychwaith yn gallu elwa ar arbenigedd iechyd meddwl penodol.
I would urge caution in jumping to conclusions about the apparent contradiction in the conclusions of the HASCAS investigation and some earlier reports and findings. Those reports focused on smaller cohorts of patients, did not have access to the very comprehensive set of documentation (including clinical records) and other evidence examined as part of the HASCAS investigations – nor were they able to draw in specific mental health expertise.