Table 1.
Preoperative and postoperative PD patients scores.
Fig 1.
Linear regression of pre- and postoperative MoCA and MDRS.
A: Scatterplot of pre- and post-MoCA scores with significant linear regression slope of 1.09 points (p<0.001). B: Scatterplot of pre- and post-MDRS scores with no significant linear relationship between pre-and post-MDRS scores (p = 0.843). pre: preoperative; post: postoperative.
Fig 2.
Linear regression of pre- and postoperative changes of MoCA and MDRS.
Scatterplot of Δ MoCA and Δ MDRS as dependent variable with linear regression slope of 1.07 points (p = 0.006) but weak model prediction. MoCA Δ, preoperative-postoperative MoCA; MDRS Δ, preoperative-postoperative MoCA.
Fig 3.
Linear regression of preoperative MoCA, MDRS and perioperative PDQ-39 SI changes.
A: Scatterplot of pre-MoCA and Δ PDQ-39 with significant linear regression slope of 2.31 points (p = 0.001). Pre-MoCA predicted postoperative quality of life. B: Scatterplot of pre-MDRS and Δ PDQ-39. There was no significant linear relationship between pre-MDRS and Δ PDQ-39 (p = 0.51). pre: preoperative; Δ PDQ-39: difference of preoperative PDQ-39 SI minus postoperative PDQ-39 SI.
Fig 4.
Conditional inference tree of preoperative MoCA and perioperative PDQ-39 SI changes.
A: Conditional inference tree revealed a three-fold partitioning of patients by the pre-MoCA score. Patients scoring ≤ 23 in the pre-MoCA had a decline of post-PDQ-39 SI. Pre-MoCA scores 23–26 resulted in a slight, but significant improvement of post-PDQ-39 SI. Patients >26 points showed the most reliable, positive post-PDQ-39 SI improvement. B: A pre-MoCA >23 points resulted in an improvement of quality of life. Patients with a pre-MoCA < = 23 showed a postoperative decline of quality of life. Pre: preoperative; post: postoperative; SD = standard deviation; N = number; % = percentage of patients; mean = Δ PDQ-39 mean; Δ PDQ-39 = difference of preoperative PDQ-39 SI minus postoperative PDQ-39 SI; Error bar = ± 1 standard deviations.
Table 2.
Comparison of patient characteristics in relation to MoCA performance.