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Table 2 Relative risks, c-statistics and weighted scores of Sour Seven Questions to predict delirium in comparison with geriatric psychiatrist’s assessment

From: Validation of the Sour Seven Questionnaire for screening delirium in hospitalized seniors by informal caregivers and untrained nurses

Question # Relative risk (95 % CI) c-statistic Weighted score
1 (Altered level of awareness) 3.43 (1.79–6.58) 0.79 3
2 (Reduced attentiveness) 3.87 (1.90–7.89) 0.62 4
3 (Fluctuation) 3.43 (1.79–6.58) 0.79 3
4 (Disordered thinking) 2.61 (1.52–4.49) 0.71 3
5 (Disorganized behaviour) 2.42 (1.44–4.09) 0.69 2
6 (Impaired eating/drinking) 1.82 (1.82–1.82) 0.63 2
7 (Difficulty in mobility) 1.27 (0.57–2.84) 0.53 1
Total    18