BMI	body mass index
CFS	chronic fatigue syndrome
CFI	Comparative Fit Index
CFA	confirmatory factor analysis
CVI	content validity index
DIF	differential item function
EFA	exploratory factor analysis
IFI	Incremental Fit Index
IRB	Institutional Review Board
KMO	Kaiser–Meyer–Olkin
MSA	measure of sampling adequacy
P-MFSMS	perimenopausal fatigue self-management scale
RMSEA	root mean square error of approximation
SD	standard deviation
SE	Standard error
TLI	Tucker–Lewis Index