Comparison of novel tools with traditional cognitive tests in detecting delirium in elderly medical patients

Table 6 Most accurate combinations of conventional bedside tests and the combined sustained attention of Lighthouse/Letter and Shape Drawing Test

	Sensitivity (95%CI)	Specificity (95%CI)	Positive predictive value (95%CI)	Negative predictive value (95%CI)	Overall accuracy (95%CI)
Overall population (n = 180)
MBT plus GVS	93.3% (86.6-97.3)	48.7% (37.0-60.4)	71.3% (66.5-75.7)	84.1% (71.4-91.8)	74.4% (67.4-80.6)
Vig A plus GVS	92.3% (85.4-96.6)	57.9% (46.0-69.1)	75.0% (69.6-79.7)	84.6% (73.3-91.7)	77.8% (71.0-83.6)
Vig A plus Vig B	93.3% (86.6-97.3)	57.9% (46.0-69.1)	75.2% (69.9-79.9)	86.3% (75.0-93.0)	78.3% (71.6-84.1)
MBT plus Vig A	90.4% (83.0-95.3)	61.8 % (50.0-72.8)	76.4% (70.7-81.3)	82.5% (71.8- 89.7)	78.3% (71.6- 84.1)
LSD-4 plus Lighthouse-SA	91.4% (84.2-96.0)	51.3 % (39.6-63.0)	72.0 % (66.9-76.5)	81.3% (69.1-89.4)	74.4% (67.4-80.6)
Dementia population (n = 90)
MBT plus GVS	93.3% (83.8-98.1)	30.0% (14.7-49.4)	72.7% (67.6-77.3)	69.2% 43.0-87.0)	72.2% (61.8-81.2)
Vig A plus GVS	95.0% (86.1-98.9)	33.3% (17.3- 52.8)	74.0% (68.7- 78.7)	76.9% (49.8-91.8)	74.4% (64.2- 83.1)
Vig A plus Vig B	95.0% (86.1-98.9)	43.3% (25.5-62.6)	77.0% (70.9-82.2)	81.3 (57.2-93.4)	77.8% (67.8-85.9)
MBT plus Vig A	95.0% (86.1-98.9)	50.0% (31.3-68.7)	79.2% (72.6-84.5)	83.3% (61.1-94.1)	80.0% (70.3-87.7)
LSD-4 plus LH-SA	95.0% (86.1-99.0)	43.3% (25.5-62.6)	77.0% (70.9-82.2)	81.3% (57.2-93.4)	77.8% (67.8-85.9)

MBT: Months Backward test; GVS: Global assessment of visuospatial abilities; CDT: Clock Drawing test; IPT: Intersecting Pentagons test; LH: Lighthouse; LSD: Letter and Shape Drawing test.