Table 5.
Correlations and agreement between age-adjusted standard scores (M=100, SD=15) on NIH Toolbox Cognition Battery and gold standard measures
| Cognitive Tests | r | CCC (95% CI) | RMSD |
|---|---|---|---|
| Fluid Composites | .58*** | .55 (.37, .70) | 11.60 |
| Executive-Set Shifting (DCCS-Trails B) | .22 | .21 (−.03, .43) | 14.74 |
| Executive-Inhibition (FICA-Stroop CW) | .10 | .09 (−.15, .32) | 16.99 |
| Episodic Memory (PSMT-RAVLT) | .48*** | .45 (.24, .62) | 20.89 |
| Working Memory (LSWM-Digit Span) | .49*** | .45 (.25, .61) | 14.15 |
| Processing Speed (PCPS-Digit Symbol) | .43*** | .31 (.16, .46) | 21.04 |
| Crystallized Composites | .84*** | .70 (.58, .79) | 12.15 |
| Receptive Vocabulary (PVT-AmNART) a | .72*** | .62 (.48, .75) | 13.65 |
| Reading Decoding (ORRT-AmNART) | .85*** | .82 (.73, .89) | 7.52 |
Notes. CCC=concordance correlation coefficient; RMSD=root mean squared difference; DCCS=Dimensional Change Card Sort Test; FICA=Flanker Inhibitory Control and Attention Test; Stroop C/W=Stroop Color-Word trial; PSMT=Picture Sequence Memory Test; RAVLT=Rey Auditory Verbal Learning Test; LSWM=List Sorting Working Memory Test; PCPS=Pattern Comparison Processing Speed; PVT=Picture Vocabulary Test; ORRT=Oral Reading Recognition Test; AmNART=American National Adult Reading Test.
*
p < .05;
**
p < .01;
***
p < .001.
a
Values are provided as reference only.