Table 4 Generalized linear model illustrating the effects of various predictor variables on the accumulation of intracranial air.

From: MER and increased operative time are not risk factors for the formation of pneumocephalus during DBS

Parameter

B

95% CI for B

p

STN*

GPI

− 0.448

− 1.130, 0.235

0.199

VIM

− 0.568

− 1.699, 0.563

0.325

BNST

− 3.356

− 5.030, − 1.682

< 0.001

HPT

   2.312

   0.522, 4.102

0.011

SCG 24

   0.329

− 1.303, 1.961

0.693

Awake vs. asleep

   0.163

− 0.503, 0.828

0.632

Burr Hole size (5 mm vs. 14 mm)

   0.024

− 0.976, 1.024

0.962

Age (years)

   0.006

− 0.016, 0.027

0.604

Unilateral vs. bilateral surgery

− 1.462

− 2.382, − 0.541

0.002

1 trajectory*

2 trajectories

0.076

− 0.689, 0.840

0.846

3 ore more trajectories

0.586

− 0.333, 1.506

0.211

MER use vs. no MER use

0.649

− 0.346, 1.643

0.201

Time (minutes)

0.000

− 0.007, 0.006

0.909

  1. P values which are statistically significant are evidenced in bold. MER microelectrode recordings, STN subthalamic nucleus, GPI globus pallidus internus, VIM ventral intermediate nucleus, BNST bed nucleus stria terminalis, HPT hypothalamus, SCG24 subgenual cingulate gyrus 24.
  2. *Set as the reference category.
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