Estimated
Figure 2: Estimated trajectories of MD and PSD using functional principal component (FPC) analysis. 2A): mean trajectory of MD (solid line) and mean ± 1st-eigenfunction (broken lines); 2B): observed (solid lines) and estimated (broken lines) of MD trajectories in 4 randomly selected participants who had different levels of 1st-FPC scores; 2C): mean trajectory of PSD (solid line) and mean ± 1st-eigenfunction (broken lines); 2D): observed (solid lines) and estimated (broken lines) of PSD trajectories in 4 randomly selected participants who had different levels of 1st-FPC scores.