Table 5 Data for cut offs for impairment per age category (z-scores greater than 1.65 SD from the mean) for each OCS-Plus subtask.

Task	Measure	Aged < 60					Aged > 60 and < 70					Aged > 70
Task	Measure	n	M	SD	Min	Max	n	M	SD	Min	Max	n	M	SD	Min	Max
Trails	Processing speed	98*	31.44	16.78	16.53	117.92	101	31.67	15.05	15.56	98.34	108	39.54	22.58	14.24	143.38
Trails	Executive score	98*	88.48	18.31	28.57	100	101	77.33	27.90	0	100	108	81.72	25.40	0	100
Rule finding	Accuracy	111	29.17	7.82	3	42	101	26.56	7.99	5	43	108	24.41	8.15	3	41
Rule finding	Number of rules learned	111	3.34	1.25	0	5	101	2.98	1.30	0	5	108	2.64	1.31	0	5
Figure copy	Figure copy	110	56.85	6.24	19	60	101	55.37	6.09	28	60	104	53.57	7.35	28	60
Figure copy	Figure recall accuracy	110	47.02	9.70	19	60	101	42.43	11.27	15	60	104	41.25	9.88	13	59
Cancellation	Accuracy	111	29.82	.43	28	30	99	29.63	.62	28	30	107	29.56	.78	27	30
Invisible cancellation	Accuracy	110	28.93	1.43	23	30	100	28.46	1.50	24	30	108	27.94	2.26	13	30

Oxford Cognitive Screen-Plus (OCS-Plus). This table can be used to calculate impairment cut offs. Processing speed is impaired if an individual Z-score is greater than 1.65 SDs from the mean, whereas the remaining tasks are impaired if an individual’s Z-score is lower than − 1.65 SDs from the mean. Asterisks reflect UK only norm data due to unexpected differences between UK and German samples.

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