Table 4.
Annual change of longitudinal temporal speech measures for strong–weak (SW) and weak–strong (WS) words in nfvPPA and lvPPA
| Follow-up |
Diagnosis interaction |
Parameter coefficientsa |
||||
|---|---|---|---|---|---|---|
| F | P | F | P | nfvPPA | lvPPA | |
| PVI_SW | 3.825 | 0.05 | 1.249 | 0.26 | −7.99 | −2.18 |
| PVI_ WS | 8.496 | 0.004 | 6.554 | 0.01 | −11.83 | −0.76 |
| Duration_SW | 2.918 | 0.09 | 11.287 | 0.001 | 75.90 | −24.73 |
| Duration_WS | 7.597 | 0.007 | 9.176 | 0.003 | 67.05 | −3.16 |
a
Parameter estimates of annual change within each group in milliseconds. lvPPA, logopenic variant primary progressive aphasia; nfvPPA, non-fluent variant primary progressive aphasia; PVI, pairwise variability index; SW, strong–weak stressed words; WS, weak–strong stressed words. Missing data: SW words data missing for 6 lvPPA and 10 nfvPPA time points, WS words missing for 4 lvPPA and 10 nfvPPA time points.