Table 4 Final mixed-effects models for the difference in the applied and measured force (F_diff) and expressed as a percentage of the applied force (F_diff%)

(Intercept)

− 213.46 (− 318.09 to − 108.82) **

− 64.49 (− 90.97 to − 38.02) **

SMT peak force (N)

− 0.04 (− 0.06 to − 0.02) **

–

SMT thrust duration (s)

− 12.62 (− 23.99 to − 1.25) *

–

SMT Rate of Force (N/s)

–

0.004 (0.003 to 0.005) **

Thoracic Thickness (mm)

0.12 (0.65 to 1.80) **

0.33 (0.18 to 0.47) **

T6/7 relative displacement in z− axis (mm)

− 3.96 (− 7.64 to − 0.28) *

–

T6 total displacement (mm)

–

− 0.23 (− 0.36 to − 0.09) **

σ ²

300.57

26.24

τ ₀₀

330.07 _cadaver

20.92 _cadaver

Intraclass correlation coefficient

0.52

0.44

N

9 _cadavers

Observations

207

222

Marginal R²

0.54

0.56

Conditional R²

0.78

0.75