Table 5. Relationship between physiological and subjective fatigue.
| I (M1) | I (M2) | I (M4) | T (M1) | T (M2) | T (M4) | F (M1) | F (M2) | F (M3) | |
|---|---|---|---|---|---|---|---|---|---|
| I (M1) | - | ||||||||
| I (M2) | 0.819* | ||||||||
| I (M4) | 0.912* | 0.921* | |||||||
| T (M1) | 0.818* | 0.733* | 0.852* | ||||||
| T (M2) | 0.658* | 0.924* | 0.835* | 0.797* | |||||
| T (M4) | 0.952* | 0.954* | 0.866* | 0.988* | 0.992* | ||||
| F (M1) | −0.114 | 0.024 | 0.202 | 0.188 | 0.196 | 0.284 | |||
| F (M2) | −0.350 | −0.274 | −0.162 | −0.206 | −0.189 | −0.164 | 0.575* | ||
| F (M3) | −0.268 | −0.223 | 0.122 | −0.077 | −0.100 | −0.043 | 0.553* | 0.694* | |
| F (M4) | −0.062 | −0.021 | 0.215 | 0.257 | 0.242 | 0.295 | 0.498* | 0.566* | 0.444* |
F = Korean version of revised Piper Fatigue Scale; I = interleukin-6; M1 = baseline; M2 = post-intervention; M3 = after 1 month; M4 = after 6 months; T = tumor necrosis factor-α.
*p < 0.001.