Table A2. PROMIS applied cognition - general concerns item set: Discrimination ‘a’ parameter estimates for IRTPRO individual subgroup runs.

Item description	Total Sample	Race/Ethnicity				Education					Age Groups			Gender		Hispanics Only Interview Language
		NH White	NH Black	Hisp.	NH API	No HS	HS	Some Coll.	Coll.	Grad.	21-49	50-64	65-84	Female	Male	Engl.	Span.
I have had trouble forming thoughts	4.35	4.52	4.42	4.32	4.00	4.13	4.31	4.56	4.04	4.51	4.45	4.37	4.14	4.22	4.64	4.72	3.45
My thinking has been slow	4.96	5.30	4.84	4.79	4.64	4.69	4.58	5.36	5.07	5.05	5.27	4.93	4.65	4.87	5.13	5.24	3.91
My thinking has been foggy	5.50	5.86	5.15	5.24	6.09	5.19	4.88	5.80	6.06	5.56	5.80	5.29	5.35	5.29	5.94	5.75	4.36
I have had trouble concentrating	5.65	5.71	5.69	5.57	5.74	5.34	5.46	5.87	5.30	6.10	5.53	5.91	5.27	5.36	6.25	5.86	4.83
I have had to work really hard to pay attention or I would make a mistake	5.63	5.99	5.75	5.14	5.38	5.15	5.89	5.83	5.43	5.45	5.92	5.70	5.22	5.62	5.72	5.14	4.90
It has seemed like my brain was not working as well as usual	6.01	6.63	6.00	5.74	5.81	5.37	6.47	6.61	6.11	6.65	6.29	6.01	5.58	6.04	6.00	6.16	5.01
I have had to work harder than usual to keep track of what I was doing	6.26	7.35	6.32	5.54	5.32	6.12	6.77	6.10	5.94	6.87	6.42	7.02	5.34	6.11	6.54	5.40	5.79
I have had trouble shifting back and forth between different activities that require thinking	5.90	6.12	6.31	6.04	5.04	6.23	5.89	6.03	5.18	5.82	5.48	6.53	5.49	5.71	6.35	5.71	7.28