Table 2. Bivariate Correlations, Means, and Standard Deviations of Latent Variable Indicators Across Both Time-Points.
| 12 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. sfenerT1 | — | ||||||||||||||
| 2. sflifeT1 | .41 | — | |||||||||||||
| 3. sfwornT1 | .48 | .29 | — | ||||||||||||
| 4. sftireT1 | .49 | .35 | .74 | — | |||||||||||
| 5. PHQ9T1 | -.36 | -.39 | -.34 | -.40 | — | ||||||||||
| 6. SCL20T1 | -.47 | -.46 | -.46 | -.51 | .74 | — | |||||||||
| 7. MHI3T1 | -.37 | -.53 | -.33 | -.40 | .65 | .74 | — | ||||||||
| 8. sfenerT2 | .41 | .29 | .39 | .36 | -.27 | -.35 | -.27 | — | |||||||
| 9. sflifteT2 | .39 | .41 | .26 | .30 | -.34 | -.42 | -.43 | .53 | — | ||||||
| 10. sfwornT2 | .33 | .30 | .44 | .43 | -.36 | -.41 | -.33 | .53 | .49 | — | |||||
| 11. sftireT2 | .32 | .25 | .38 | .43 | -.24 | -.31 | -.25 | .56 | .45 | .78 | — | ||||
| 12. PHQ9T2 | -.31 | -.25 | -.31 | -.34 | .44 | .53 | .46 | -.48 | -.54 | -.60 | -.54 | — | |||
| 13. SCL20T2 | -.32 | -.26 | -.30 | -.28 | .43 | .58 | .43 | -.51 | -.59 | -.58 | -.50 | .85 | — | ||
| 14. MHI-3T2 | -.33 | -.30 | -.27 | -.30 | .44 | .53 | .56 | -.44 | -.63 | -.51 | -.46 | .73 | — | ||
| 15. Tx Group | -.02 | .03 | .07 | .06 | .04 | -.01 | .04 | -.05 | -.11 | -.03 | -.06 | .16 | .20 | .12 | — |
| M | 1.90 | 2.40 | 2.29 | 2.06 | 12.84 | 1.44 | 8.05 | 2.19 | 2.58 | 2.65 | 2.44 | 9.20 | 1.10 | 7.26 | |
| SD | 0.88 | 1.14 | 1.06 | 0.99 | 6.85 | 0.73 | 2.96 | 1.03 | 1.22 | 1.13 | 1.08 | 6.28 | 0.69 | 3.02 |
Note. Fatigue indicators are sfener (“lot of energy”), sflife (“full of life”), sfworn (“feel worn out”), sftire (“feel tired”). Depression indicators are PHQ9 (Patient Health Questionnaire, Depression), SCL20 (Depression Subscale of the Hopkins Symptom Checklist), MHI-3 (Mental Health Inventory Depression Subscale). T1 = baseline; T2 = 3 months. Negative correlations suggest a positive association between fatigue and depression because higher vitality scores suggest less fatigue whereas higher depression scores suggest worse symptoms. Correlations between variables 1 – 14 are all significant at the 0.01 level (2-tailed). For variable 15, all correlations are nonsignficant except for 9, 12, 13, and 14.