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    <div class="table-caption">
        <span class="label">Table 2</span>
        <span class="caption">Comparisons of features between the clusters classified by Louvain clustering unsupervised machine learning.</span>
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<th>Variables</th>
<th>Cluster 1 (<i>n</i> = 57)</th>
<th>Cluster 2 (<i>n</i> = 51)</th>
<th>Cluster 3 (<i>n</i> = 42)</th>
<th>Cluster 4 (<i>n</i> = 41)</th>
<th><i>p</i></th>
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<td>EOAQ</td>
<td>(-)OA = 31 ; (+)OA = 26</td>
<td>(-)OA = 30 ; (+)OA = 21</td>
<td>(-)OA = 17 ; (+)OA = 25</td>
<td>(-)OA = 12 ; (+)OA = 29</td>
<td>0.019</td>
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<td>Sex</td>
<td>M = 11 ; F = 46</td>
<td>M = 51 ; F = 0</td>
<td>M = 21 ; F = 21</td>
<td>M = 26 ; F = 15</td>
<td>&lt;0.001</td>
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<td>Age</td>
<td>62.07 ± 5.60</td>
<td>44.80 ± 11.30</td>
<td>66.45 ± 8.40</td>
<td>62.39 ± 10.10</td>
<td>&lt;0.001</td>
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<td>Height</td>
<td>159.32 ± 5.00</td>
<td>172.27 ± 7.20</td>
<td>160.64 ± 6.10</td>
<td>166.44 ± 6.30</td>
<td>&lt;0.001</td>
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<td>Weight</td>
<td>57.69 ± 4.92</td>
<td>76.02 ± 9.22</td>
<td>57.55 ± 5.32</td>
<td>61.49 ± 7.23</td>
<td>&lt;0.001</td>
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<td>BMI</td>
<td>22.73 ± 1.57</td>
<td>25.59 ± 2.42</td>
<td>22.28 ± 1.28</td>
<td>22.14 ± 1.55</td>
<td>&lt;0.001</td>
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<td>PHD-SU</td>
<td>9.21 ± 1.55</td>
<td>8.08 ± 1.92</td>
<td>9.53 ± 1.74</td>
<td>10.72 ± 0.92</td>
<td>&lt;0.001</td>
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<td>FHD-SU</td>
<td>8.06 ± 1.26</td>
<td>7.78 ± 1.64</td>
<td>7.81 ± 1.38</td>
<td>10.16 ± 1.11</td>
<td>&lt;0.001</td>
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<td>KHD-SU</td>
<td>5.03 ± 1.54</td>
<td>4.01 ± 1.27</td>
<td>3.68 ± 0.77</td>
<td>6.87 ± 0.47</td>
<td>&lt;0.001</td>
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<td>LHD-SU</td>
<td>3.94 ± 1.54</td>
<td>2.90 ± 0.95</td>
<td>3.12 ± 0.73</td>
<td>5.61 ± 0.49</td>
<td>&lt;0.001</td>
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<td>AHD-SU</td>
<td>0.27 ± 0.23</td>
<td>0.21 ± 0.22</td>
<td>0.39 ± 0.37</td>
<td>0.26 ± 0.31</td>
<td>0.017</td>
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<td>PHD-SD</td>
<td>3.53 ± 0.97</td>
<td>4.57 ± 1.41</td>
<td>6.07 ± 1.17</td>
<td>5.35 ± 1.01</td>
<td>&lt;0.001</td>
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<td>FHD-SD</td>
<td>2.25 ± 1.27</td>
<td>4.60 ± 1.64</td>
<td>5.80 ± 0.79</td>
<td>4.95 ± 1.22</td>
<td>&lt;0.001</td>
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<td>KHD-SD</td>
<td>−0.63 ± 2.62</td>
<td>4.46 ± 2.36</td>
<td>5.37 ± 2.16</td>
<td>4.46 ± 2.36</td>
<td>&lt;0.001</td>
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<td>LHD-SD</td>
<td>2.40 ± 2.05</td>
<td>3.29 ± 1.55</td>
<td>3.86 ± 1.51</td>
<td>3.80 ± 0.97</td>
<td>&lt;0.001</td>
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<td>AHD-SD</td>
<td>0.57 ± 0.46</td>
<td>0.81 ± 0.60</td>
<td>0.98 ± 0.52</td>
<td>2.59 ± 2.62</td>
<td>&lt;0.001</td>
</tr>
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    <div class="note">
        Notes: EOA early osteoarthritis EOAQ Early Osteoarthritis Questionnaire PHD pelvic horizontal displacement FHD femur horizontal displacement KHD knee horizontal displacement LHD lower leg horizontal displacement AHD ankle horizontal displacement SU step up SD step down
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