title: Relationship between cognitive status at admission and incident delirium in older medical inpatients.
abstract: To evaluate the relationship between cognitive status and incident delirium, 291 geriatric patients on internal medicine wards were evaluated on admission with the Mini-Mental State Examination (MMSE) and Confusion Assessment Method-Spanish. Those with incident delirium were assessed using the Delirium Rating Scale-Revised-98 (DRS-R98). Delirium incidence was 11.7%, and 82 patients (28.2%) had cognitive deficits on MMSE. As cognitive impairment worsened, the risk for delirium increased linearly, and for each unit of MMSE worsening the DRS-R98 severity score worsened 0.4 points (F=5.39, df=1, p=0.027). Optimal MMSE cutoff score from receiver-operating characteristic curve analysis was 24.5. Even mild cognitive deficits increase delirium risk and severity.
authors.affiliation: Calle San Antonio, Numero 10, 1o 2a, Postal Code 43201, Reus, Spain. josefranco11@hotmail.com
authors.forename: José G
authors.initials: JG
authors.lastname: Franco
authors.forename: Camila
authors.initials: C
authors.lastname: Valencia
authors.forename: Carolina
authors.initials: C
authors.lastname: Bernal
authors.forename: María V
authors.initials: MV
authors.lastname: Ocampo
authors.forename: Paula T
authors.initials: PT
authors.lastname: Trzepacz
authors.forename: Joan de
authors.initials: Jd
authors.lastname: Pablo
authors.forename: Mario A
authors.initials: MA
authors.lastname: Mejía
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D003072:Cognition Disorders / Q000150:complications / Q000175:diagnosis* / Q000523:psychology; D003693:Delirium / Q000175:diagnosis* / Q000209:etiology / Q000523:psychology; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D007297:Inpatients / Q000523:psychology*; D008297:Male; D008875:Middle Aged; D010343:Patient Admission; D018579:Patient Selection; D011569:Psychiatric Status Rating Scales; D012307:Risk Factors; D012720:Severity of Illness Index; D018709:Statistics, Nonparametric