Table 3.

Interrater reliability study

A. Demographic and clinical data
Age at visit (mean ± SD)	52.3 ± 12.0
Sex (male:famale)	21:19
Education in years (mean ± SD)	15.6 ± 2.0
Race	100% white
Diagnosis	N (%)
CN	20 (50.0%)
MCl-beh,	4 (10.0%)
MCl-cog	5 (12.5%)
bvFTD	8 (20.0%)
nfyPPA	1 (2.5%)
AD	1 (2.5%)
ALS	1 (2.5%)

B. Weighted kappa and ICC statistics
Description	Estimate	Lower 95% CL	Upper 95% CL
Weighted Kappa for global CDR plus NACC FTLD	0.842	0.723	0.960
Weighted Kappa for global CDR	0.843	0.715	0.971
ICC for CDR plus NACC FTLD sum of boxes	0.947	0.873	0.983
ICC for CDR sum of boxes	0.945	0.855	0.983

Abbreviation: AD, Alzheimer’s disease; bvFTD, behavioral variant frontotemporal dementia; CL, confidence level; ICC, intraclass correlation; MCI‐beh, mild behavioral change; MCI‐cog, mild cognitive impairment; nfvPPA, non‐fluent/agrammatic variant primary progressive aphasia.