Table 7 Eigenvectors of ten principal components from PCA

	PC1	PC2	PC3	PC4	PC5	PC6	PC7	PC8	PC9	PC10
Dyspnea	0.526	−0.242	0.170	−0.199	0.066	−0.093	0.202	−0.034	−0.280	0.680
Tachypnea	0.552	−0.194	0.127	−0.170	0.000	−0.113	0.213	0.004	−0.168	−0.726
Hemoptysis	0.159	0.407	−0.524	−0.276	−0.252	0.417	−0.029	0.234	−0.407	0.007
Pleuritic pain	0.102	0.359	0.057	−0.144	0.869	0.036	−0.075	0.262	0.078	−0.019
Hydrothorax	0.308	0.040	−0.081	0.443	0.179	0.535	−0.058	−0.613	0.053	−0.010
Syncope	−0.203	0.056	0.531	−0.130	−0.097	0.581	0.518	0.176	0.102	−0.007
Hypoxia	0.278	−0.067	0.394	0.162	−0.201	0.225	−0.689	0.409	0.063	0.011
Fever	0.090	0.444	0.160	0.678	−0.093	−0.281	0.280	0.217	−0.310	0.017
Cough	0.401	0.309	−0.159	−0.051	−0.243	−0.117	0.181	0.081	0.771	0.100
Edema in lower extremities	0.022	−0.554	−0.428	0.365	0.166	0.189	0.225	0.498	0.120	0.016

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