## 3 Results
### Descriptive Statistics  
Table 5 shows the means and standard deviations for all parameters of the three GGI groups (GGI\({}_{1}\) (N = 16), GGI\({}_{2}\) (N = 29), GGI\({}_{3}\) (N = 6)). The GAW parameters CQ and OQ increase steadily from GGI\({}_{3}\), while for the parameters ASI and PAI no clear trend is discernible. The remaining parameters decrease from GGI\({}_{1}\) to GGI\({}_{3}\). With the exception of P\({}_{\text{S}}\), the values of the other two aerodynamic parameters R\({}_{\text{B}}\) and SPL and those of the harmonic parameters CPP\({}_{\text{A}}\) and CPP\({}_{\text{P}}\) decrease from GGI\({}_{1}\) to GGI\({}_{3}\). \begin{table}
\begin{tabular}{l c c c c} \hline \hline \multirow{2}{*}{**Parameters**} & \multirow{2}{*}{**Kruskal-Wallis-test**} & \multicolumn{2}{c}{**Post hoc tests (corrected significance level p = 0.017)**} & \multirow{2}{*}{**Mann-Whitney-U-/-test**} \\  & & & & \\ \hline \multicolumn{5}{c}{**GGI\({}_{1,23}\)**} & \multicolumn{1}{c}{**GGI\({}_{1,2}\)**} & \multicolumn{1}{c}{GGI\({}_{1,3}\)**} & \multicolumn{1}{c}{GGI\({}_{2,3}\)**} & \multicolumn{1}{c}{**Group\({}_{\text{S,A}}\)**} \\ \hline \multicolumn{5}{c}{**(B) Aerodynamic parameters**} \\ \hline \(\mathbf{R_{\text{B}}\) (\(\mathbf{Pa}\) s\({}^{-1}\))** & 0.038 & - & - & - & 0.440 \\ SPL (dB) & **0.004** & 0.981 & **0.002** & **0.014** & **0.000** \\ P\({}_{\text{S}}\) (\(\mathbf{Pa}\)) & 0.086 & - & - & - & 0.715 \\ \hline \multicolumn{5}{c}{**(C) Harmonic measures**} \\ \hline CPP\({}_{\text{A}}\) & **0.020** & 0.129 & **0.005** & 0.066 & 0.677 \\ CPP\({}_{\text{P}}\) & 0.123 & - & - & - & 0.231 \\ \hline \hline \end{tabular}  
* First four columns: Calculated p-values between the three GGI groups. Last column: Calculated p-values for two vibrational characteristics (GroupS and GroupA). Significant p-values are highlighted in bold type.  
\end{table} 
Table 4: _Cont._ \begin{table}
\begin{tabular}{l c c c c} \hline \hline \multirow{2}{*}{**Parameters**} & \multicolumn{2}{c}{**Mean \(\pm\) standard deviations**} & \multirow{2}{*}{**Tendency for GGI\({}_{1,3}\)**} \\  & & **GGI\({}_{1}\)** & **GGI\({}_{2}\)** & **GGI\({}_{3}\)** \\ \hline \multicolumn{5}{c}{**(A) GAW Measures**} \\ \hline
**ALR (a.u.)** & \(16.5\pm 4.5\) & \(16.1\pm 6.7\) & \(4.9\pm 5.1\) & decrease \\
**STIFFNESS (frames\({}^{-1}\))** & \(0.33\pm 0.06\) & \(0.28\pm 0.05\) & \(0.26\pm 0.06\) & decrease \\
**ASQ (a.u.)** & \(0.60\pm 0.15\) & \(0.49\pm 0.14\) & \(0.52\pm 0.05\) & decrease \\
**CO (a.u.)** & \(0.34\pm 0.14\) & \(0.50\pm 0.15\) & \(0.48\pm 0.05\) & increase \\
**OQ (a.u.)** & \(0.87\pm 0.13\) & \(0.99\pm 0.0\) & \(1.00\pm 0.00\) & increase \\
**SQ (a.u.)** & \(2.47\pm 2.50\) & \(1.34\pm 0.97\) & \(1.25\pm 0.31\) & decrease \\
**ASI (a.u.)** & \(0.74\pm 0.15\) & \(0.85\pm 0.08\) & \(0.74\pm 0.13\) & - \\
**PAI (a.u.)** & \(0.14\pm 0.10\) & \(0.10\pm 0.12\) & \(0.14\pm 0.06\) & - \\ \hline \hline \multicolumn{5}{c}{**(B) Aerodynamic parameters**} \\ \hline \(\mathbf{R_{\text{B}}\) (\(\mathbf{Pa}\) s\({}^{-1}\))** & \(14376\pm 5090\) & \(9992\pm 5759\) & \(10510\pm 4414\) & decrease \\
**SPL (dB)** & \(76.7\pm 6.5\) & \(76.0\pm 7.6\) & \(59.5\pm 7.5\) & decrease \\
**P\({}_{\text{S}}\) (\(\mathbf{Pa}\))** & \(1783\pm 1073\) & \(1050\pm 514\) & \(1423\pm 662\) & - \\ \hline \hline \multicolumn{5}{c}{**(C) Harmonic measures**} \\ \hline CPP\({}_{\text{A}}\) (dB) & \(17.9\pm 4.3\) & \(15.8\pm 6.5\) & \(11.0\pm 3.4\) & decrease \\ CPP\({}_{\text{P}}\) (dB) & \(19.4\pm 5.8\) & \(16.9\pm 5.6\) & \(14.0\pm 2.9\) & decrease \\ \hline \hline \end{tabular}  
* First four columns: Calculated p-values between the three GGI groups. Last column: Calculated p-values for two vibrational characteristics (GroupS and GroupA). Significant p-values are highlighted in bold type.  
\end{table} 
Table 5: Mean values and standard deviations for the GAW, aerodynamic and harmonic measures of the three different GGI groups with tendencies.