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Table 1 Baseline demographic and clinical characteristics stratified by reference standard delirium status

From: Delirium detection in older acute medical inpatients: a multicentre prospective comparative diagnostic test accuracy study of the 4AT and the confusion assessment method

  Total (N = 785) Delirium present (N = 95) Delirium absent (N = 690) p value
Age (years)
 Mean (SD) 81.4 (6.4) 83.5 (6.9) 81.1 (6.3) 0.0007
 Median [Q1–Q3] 81.0 [77.0–86.0] 84.0 [78.0–89.0] 81.0 [77.0–86.0]
Gender
 Male, n (%) 349 (44.5%) 34 (35.8%) 315 (45.7%) 0.0697
 Female, n (%) 436 (55.5%) 61 (64.2%) 375 (54.3%)
Dementia diagnosis and/or IQCODE ≥ 3.44
 Yes, n (%) 111 (14.2%) 43 (45.3%) 68 (9.9%) < 0.0001
 No, n (%) 673 (85.5%) 52 (54.7%) 621 (90.1%)
 Missing*, n (%) 1 (0.1%) 0 (0.0%) 1 (0.1%)
Location of first assessment
 Emergency department, n (%) 53 (6.8%) 10 (10.5%) 43 (6.2%) 0.2624
 Acute general medical ward, n (%) 665 (84.7%) 76 (80.0%) 589 (85.4%)
 Hospital ward, n (%) 67 (8.5%) 9 (9.5%) 58 (8.4%)
  1. p value from chi-squared (categorical variables) or t test (continuous)
  2. IQCODE Informant Questionnaire for Cognitive Impairment in the Elderly
  3. *Missing category not included in chi-squared test
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