Table 2.

Main variables identified after factor analysis. Five main PCs were identified. The values in the cells are the correlation coefficients between individual symptoms and the main PC identified.

	Principal Component (PC)
	Polyneuropathy (PC-PN)	Cardiomyopathy (PC-CM)	Gastrointestinal (PC-GI)	General Complaints (PC-GP)	Carpal Tunnel Synd. (PC-CT)
Carpal tunnel	0.003	0.007	0.043	−0.049	0.793
Water retention: ankle, limbs	−0.041	0.358	0.038	0.198	0.533
Shortness of breath	−0.224	0.623	0.022	0.125	0.305
Difficulty in holding back urine	0.139	0.059	0.362	0.070	0.262
Numbness or tingling	0.667	−0.174	0.068	0.003	0.257
Burning feet	0.726	−0.055	0.074	−0.061	0.110
Chest pain	−0.019	0.518	0.146	−0.122	0.087
Constipation	0.079	0.056	0.667	0.067	0.067
Anemia	−0.030	0.128	0.020	0.678	0.064
Heartbeat alterations	0.014	0.717	0.037	0.151	0.031
Unintended weight loss	0.020	−0.054	0.123	0.747	0.017
Dizziness	0.219	0.288	0.238	0.227	0.009
Allodynia	0.630	0.067	0.047	−0.014	−0.124
Sensing temperature alterations	0.752	−0.064	0.031	−0.029	−0.083
Palpitations	0.028	0.809	0.047	0.003	−0.079
Dyshidrosis	0.410	0.108	0.178	0.185	−0.073
Constipation/diarrhea bouts	0.088	0.083	0.833	−0.011	−0.034
Diarrhea	0.033	0.080	0.753	0.079	−0.020

Robust correlations (>0.6) between individual symptoms and PC are presented in bold.