Table 3. Mean scores of each IQCODE item for pre-event dementia vs no dementia (p<0.0001 for all 16 items). Rank difference is rank based on mean difference from highest to lowest.

	Dementia Mean (95% CI)	No dementia Mean (95% CI)	Mean difference	Rank difference
1: Family	4.24 (4.02-4.44)	3.14 (3.10-3.18)	1.10	13
2: Recent	4.51 (4.37-4.66)	3.28 (3.23-3.32)	1.24	5
3: Conversation	4.56 (4.41-4.71)	3.33 (3.28-3.37)	1.23	6
4: Address	4.03 (3.82-4.24)	3.00 (2.97-3.03)	1.03	16
5: Day and month	4.22 (4.03-4.41)	3.07 (3.04-3.11)	1.15	10
6: Things kept	4.16 (3.97-4.36)	3.14 (3.11-3.18)	1.02	15
7: Different place	4.56 (4.39-4.72)	3.34 (3.30-3.38)	1.22	7
8: Machines	4.14 (3.94-4.33)	3.04 (3.00-3.07)	1.10	14
9: Gadget	4.61 (4.45-4.76)	3.25 (3.20-3.29)	1.36	2
10: New things	4.52 (4.33-4.70)	3.26 (3.22-3.30)	1.26	4
11: Story	4.24 (4.04-4.43)	3.11 (3.07-3.14)	1.13	11
12: Decisions	4.36 (4.17-4.55)	3.17 (3.13-3.21)	1.19	8
13: Money	4.22 (4.02-4.43)	3.03 (3.00-3.06)	1.19	9
14: Finances	4.48 (4.30-4.66)	3.12 (3.08-3.16)	1.36	1
15: Arithmetic	4.44 (4.26-4.62)	3.09 (3.05-3.12)	1.35	3
16: Intelligence	4.36 (4.17-4.55)	3.22 (3.11-3.18)	1.12	12