Table 2.

The table below is the principal component analysis for CFP for seven groups for 19 subjects who are suffering from COPD. PC1 represents the first principal component, PC2 the second, until the seventh component PC7.

Variable	PC1	PC2	PC3	PC4	PC5	PC6	PC7
CFP1	0.357	−0.409	0.105	−0.639	0.202	−0.141	−0.474
CFP2	0.045	−0.590	0.660	0.248	0.017	0.272	0.281
CFP3	0.197	−0.544	−0.501	0.496	0.002	−0.408	−0.041
CFP4	0.486	0.075	−0.028	−0.320	−0.211	−0.294	0.724
CFP5	0.448	0.239	0.312	0.282	−0.619	−0.105	−0.413
CFP6	0.489	−0.007	−0.385	0.050	0.042	0.780	0.009
CFP7	−0.394	−0.355	−0.237	−0.315	−0.727	0.186	0.017