Table 1

Minimally important differences for select FACIT scales

Instrument
Scale/Subscale
MID (points)
Reference

FACT-G
PWB
2–3
[28]

SWB
NA


EWB
2*
[28,29]

FWB
2–3
[28]

Total FACT-G
3–7
[27,28,30,31]
FACT-Anemia
Fatigue Subscale
3–4
[27,31]

TOI-Fatigue
5
[27]

TOI-Anemia
6


Total FACT-Anemia
7

FACT-Breast
Breast cancer subscale
2–3
[30]

TOI-Breast
5–6


Total FACT-Breast
7–8

FACT-Colorectal
Colorectal cancer subscale
2–3
[32]

TOI-Colorectal
4–6


Total FACT-Colorectal
5–8

FACT-Head & Neck
Total FACT-Head & Neck
6–12
[33]
FACT-Lung
Lung cancer subscale
2–3
[34]

TOI-Lung
5–6


*This MID should be considered tentative as it may be revised based on future research.

Webster et al. Health and Quality of Life Outcomes 2003 1:79   doi:10.1186/1477-7525-1-79