Table 2: Presence of individual DRS-R-98 delirium symptoms on first day of delirium.

DRS-R-98 itemShort delirium ( )Prolonged delirium ( ) value

(1) Sleep-wake cycle disturbance21 (95.5%)29 (100%)0.43
(2) Perceptual disturbances and hallucinations8/21 (38.1%)13/27 (48.1%)0.49
(3) Delusions11/21 (52.4%)14/27 (51.9%)0.97
(4) Affective lability15 (68.2%)15/28 (53.6%)0.30
(5) Language problems18 (81.8%)22 (75.9%)0.74
(6) Thought process abnormalities19 (86.4%)27 (93.1%)0.64
(7) Motor agitation14 (63.6%)20 (69%)0.69
(8) Motor retardation11/21 (52.4%)20 (69%)0.23
(9) Orientation problems22 (100%)28 (96.6%)1.00
(10) Attention deficits22 (100%)28 (96.6%)1.00
(11) Short-term memory impairment20/21 (95.2%)27/28 (96.4%)1.00
(12) Long-term memory impairment12/18 (66.7%)22/28 (78.6%)0.37
(13) Visuospatial impairment9/18 (50%)21/25 (84%)0.02

Data are presented as (%) or (%) in case of missing data.