## 3 Results
\begin{tabular}{c} 93.2 \\ (87.1;97.0) \\ \end{tabular}  & \begin{tabular}{c} 20.0 \\ (6.6;47.0) \\ \end{tabular}  & \begin{tabular}{c} 97.4 \\ (94.7;98.7) \\ \end{tabular}  & \ \begin{tabular}{c} 5.9 \\ (1.7;20.9) \\ \end{tabular}  & \begin{tabular}{c} 0.6 \\ (0.3;1.3) \\ \end{tabular}  \\ \hline
32 & 4 & 7 & 1 & 11 & \begin{tabular}{c} 80.0 \\ (28.4;99.5) \\ \end{tabular}  & \begin{tabular}{c} 61.1 \\ (35.7;82.7) \\ \end{tabular}  & \begin{tabular}{c} 36.4 \\ (21.7;54.2) \\ \end{tabular}  & \begin{tabular}{c} 91.7 \\ (64.7;98.5) \\ \end{tabular}  & \ \begin{tabular}{c} 2.1 \\ (1.0;4.3) \\ \end{tabular}  & \begin{tabular}{c} 0.3 \\ (0.0;1.9) \\ \end{tabular}  \\ \hline
33 & 2 & 3 & 3 & 115 & \begin{tabular}{c} 40.0 \\ (5.3;85.3) \\ \end{tabular}  & \begin{tabular}{c} 97.5 \\ (92.8;99.5) \\ \end{tabular}  & \begin{tabular}{c} 40.0 \\ (12.4;75.8) \\ \end{tabular}  & \begin{tabular}{c} 97.4 \\ (94.8;98.7) \\ \end{tabular}  & \ \begin{tabular}{c} 15.7 \\ (3.3;74.1) \\ \end{tabular}  & \begin{tabular}{c} 0.6 \\ (3.3;74.1) \\ \end{tabular}  \\ \hline
\begin{tabular}{c} 100.0
Positions of all the items are shown in the two-dimensional subspace obtained by MCA. The first dimension could be interpreted as the \"sleep quality\" dimension. Items 31-33 and 37 showed the highest contribution to the inertia (Table 3) and were proximal on the first axis and far away from the origin (Figure 1). The second dimension could be interpreted as the \"anamnesis\" dimension., Items 27-28 showed the highest contribution to the inertia (Table 3) and were proximal on the second axis and far away from the origin (Figure 1). \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Item nr.** & **Category** & **Overall \% Inertia** & \multicolumn{3}{c}{**Absolute Contribution to Inertia**} \\ \cline{4-9}  & & & & & & **Sleep Disorders** & **Anamnesis** \\ \hline
24 & no & 0.006 & 0.006 & 0.003 \\  & yes & 0.078 & 0.081 & 0.042 \\ \hline
25 & no & 0.001 & 0.001 & 0.000 \\  & yes & 0.075 & 0.086 & 0.028 \\ \hline
26 & no & 0.013 & 0.001 & 0.068 \\  & yes & 0.016 & 0.002 & 0.083 \\ \hline
27 & no & 0.007 & 0.001 & 0.033 \\  & yes & 0.053 & 0.008 & **0.237** \\ \hline
28 & no & 0.007 & 0.002 & 0.027 \\  & yes & 0.056 & 0.014 & **0.212** \\ \hline
29 & no & 0.015 & 0.001 & 0.008 \\  & yes & 0.000 & 0.000 & 0.000 \\ \hline
30 & no & 0.018 & 0.022 & 0.008 \\  & yes & 0.030 & 0.037 & 0.013 \\ \hline
31 & no & 0.010 & 0.013 & 0.004 \\  & yes & 0.110 & **0.147** & 0.04 \\ \hline
32 & no & 0.010 & 0.013 & 0.001 \\  & yes & 0.107 & **0.133** & 0.015 \\ \hline
33 & no & 0.007 & 0.009 & 0.001 \\  & yes & 0.156 & **0.210** & 0.018 \\ \hline
34 & no & 0.001 & 0.001 & 0.000 \\  & yes & 0.074 & 0.081 & 0.017 \\ \hline
35 & no & 0.002 & 0.000 & 0.003 \\  & yes & 0.025 & 0.002 & 0.051 \\ \hline
36 & no & 0.000 & 0.000 & 0.001 \\  & yes & 0.026 & 0.004 & 0.057 \\ \hline
37 & no & 0.007 & 0.009 & 0.002 \\  & yes & 0.090 & **0.115** & 0.027 \\ \hline \hline \end{tabular}  
* The highest contributions (in bold) indicate the items’ categories contributing most to each dimension.  
\end{table} 
Table 3: Multiple correspondence analysis (MCA) results of the additional 15 items for OSAS: overall percentage of inertia and absolute contributions of categories to each dimension.