Table 1.

Comparison of PROMIS Short Form 8a to FACT-Cog

PROMIS Short Form 8a Items	Approximate FACT-Cog Items
1. I have had trouble forming thoughts.	CogA1
2. My thinking has been slow.	CogA3
3. I have had trouble concentrating.	CogC7
4. I have had to work really hard to pay attention or I would make a mistake.	CogF23
5. I have had to work harder than usual to keep track of what I was doing.	CogC31
6. It has seemed like my brain was not working as well as usual (maps to “My thinking has been slower than usual.” From the FACT-Cog PCI, however not exact match).	CogC32
7. I have had trouble shifting back and forth between different activities that require thinking.	CogMT2
8. I have had trouble adding or subtracting numbers in my head.	No PCI item, mean substitution used to create item