Concordance between DSM-IV and DSM-5 criteria for delirium diagnosis in a pooled database of 768 prospectively evaluated patients using the delirium rating scale-revised-98

Table 5 Clinical and demographic characteristics of the whole population and subgroups as determined by DSM-IV and DSM-5 delirium criteria

	Whole group	DSM-IV criteria		Strict DSM-5 criteria		Relaxed DSM-5 criteria
		Delirium	No delirium	Delirium	No delirium	Delirium	No delirium
Number	768	510	258	158	610	466	302
Mean age ^a	67.4 ± 18.7	68.7 ± 18.2	64.6 ± 19.9	70.8 ± 16.9	66.5 ± 19.3	67.9 ± 18.5	67.3 ± 18.2
Sex (% male)	49	53	45	50	50	55	40
Frequency of comorbid dementia (%) ^b	28	30	25	28	30	24	37
Mean DRS-R98 total scores ^c	17.2 ± 9.7	22.6 ± 6.5	6.6 ± 4.9	25.9 ± 5.8	14.9 ± 9.2	23.5 ± 6.2	7.6 ± 5.1

^a P <0.01 for delirium versus non-delirium groups for DSM-IV and strict DSM-5 criteria; ^b P <0.001 for delirium versus non-delirium groups for relaxed DSM-5 criteria; ^c P <0.001 for delirium versus non-delirium groups for all criteria. DRS-R98 Revised Delirium Rating Scale - 1998 version, DSM-IV Diagnostic and Statistical Manual fourth edition, DSM-5 Diagnostic and Statistical Manual fifth edition.