Brains of 13 autistic and 14 age-matched control subjects were examined by postmortem MRI and neuropathologically. The postmortem interval (PMI) varied, ranging from 6 to 27.8 h in the control group (16 h on average; SD 6 h) and from 8 to 30 h in the autistic group (20 h on average; SD 12 h). The median PMI was 15 h.
