Table 2 Descriptive analysis of displacements along the axes divided into maximum displacement during a treatment session, and all samples of a treatment session. Furthermore, the observation results are split into samples during beam-on time only and the whole treatment session time (n = 104 patients, sessions = 2028)

Maximum displacement per session

(N = 2028)

Mean ± Standard deviation [mm]

Median [mm]

95%-CI [mm]

Mean ± Standard deviation [mm]

Median [mm]

95%-CI [mm]

 Lateral

0.18 ± 1.06

0.38

[−1.88–2.1]

−0.04 ± 1.39

−0.25

[−2.67–2.3]

 Longitudinal

0.17 ± 1.32

0.34

[−2.89–3.11]

0.10 ± 1.71

0.45

[−3.36–3.23]

 Vertical

0.68 ± 1.53

0.84

[−2.9–3.55]

0.70 ± 1.87

1.07

[− 3.62–3.74]

 Magnitude of deviation-vector

1.93 ± 1.14

1.63

[0.48–4.65]

2.34 ± 1.40

2.03

[0.78–5.35]

 Lateral

0.08 ± 0.65

0.06

[−1.24–1.48]

0.07 ± 0.67

0.06

[−1.32–1.49]

 Longitudinal

0.09 ± 0.81

0.04

[− 1.79–2.17]

0.10 ± 0.84

0.05

[−1.78–2.15]

 Vertical

0.39 ± 0.98

0.36

[− 1.64–2.60]

0.43 ± 1.03

0.40

[−1.79–2.67]

 Magnitude of deviation-vector

1.12 ± 0.98

0.78

[0.11–3.77]

1.19 ± 0.99

0.88

[0.13–3.8]