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. 2014 Mar 11;82(10):887–894. doi: 10.1212/WNL.0000000000000183

Figure 2. Estimated least squares mean of overall QOL and BDI score over time.

Figure 2

Surface plots demonstrate the relationship between quality of life (QOL) and depression scores (Beck Depression Inventory [BDI]) over time. The z-axis provides QOL T scores and color codes lowest scores blue to highest scores red. The x-axis shows changes in QOL and BDI over time in months, with the 0 point designated as the presurgical evaluation. The y-axis shows the BDI scores, with high scores indicating more severe depression. Figure parts A, B, C, and D represent subjects with excellent, good, fair, and poor seizure control, respectively. The scatter plots clearly show more dark red, reflecting better QOL, in subjects with better seizure control. Furthermore, with the exception of fair seizure control, the QOL improves (becomes more red) with time. Finally, there is improved QOL with lower BDI scores across each level of seizure control.