"The scale of the observed deficits was not insubstantial; the 0.57 SD global composite score reduction
for the hospitalised with ventilator sub-group was equivalent to the average 10-year decline in global
performance between the ages of 20 to 70 within this dataset. It was larger than the mean deficit of
512 people who indicated they had previously suffered a stroke (-0.40SDs) and the 1016 who reported
learning disabilities (-0.49SDs). For comparison, in a classic intelligence test, 0.57 SDs equates to an
8.5-point difference in IQ."
"The scale of the observed deficits was not insubstantial; the 0.57 SD global composite score reduction for the hospitalised with ventilator sub-group was equivalent to the average 10-year decline in global performance between the ages of 20 to 70 within this dataset. It was larger than the mean deficit of 512 people who indicated they had previously suffered a stroke (-0.40SDs) and the 1016 who reported learning disabilities (-0.49SDs). For comparison, in a classic intelligence test, 0.57 SDs equates to an 8.5-point difference in IQ."