One study found that of such observations were completely accurate.

: Hypoxia typically causes confusion and agitation, whereas NDEs are characterized by clarity and peace.

Near-Death Experiences Evidence for Their Reality - PMC - NIH

: Experiencers often meet people they knew who had died.

: Experiences like those from ketamine are often described as unpleasant or chaotic, unlike the organized narrative of an NDE. Notable Research & Books