Table 3. Correlations Among Predictor Variables and Caregiver Health Outcomes.
| Variable | Il-1ra | IL-6 | PHealth | Fatigue | FSQOL | CES-D | FACIT-Sp | ISEL | WLQ |
|---|---|---|---|---|---|---|---|---|---|
| Demographic variables | |||||||||
| Age | 27** | .21* | .11 | −.07 | −.09 | −.01 | −.12 | −.06 | .21 |
| Gender | .17 | .19 | −.07 | −.03 | −.15 | −.05 | .01 | .02 | .04 |
| CR Karnofsky score | .04 | .06 | .23* | .15 | .01 | −.02 | .15 | .04 | .01 |
| Employment status | −.15 | −.06 | −.02 | −.02 | −.07 | .07 | .00 | −.01 | −.05 |
| POMS-Anxiety | .20 | .03 | .08 | −.22* | .39** | .30** | −.20* | −.17 | .01 |
| Smoking status | −.14 | −.04 | .02 | .21* | −.05 | .24* | −.11 | .00 | −.12 |
| Number of comorbidities | .25* | .14 | −.44** | −.12 | −.04 | −.05 | .00 | −.12 | .21 |
| Sleep loss variables | |||||||||
| TST | .18 | −.10 | −.06 | −.25* | −.33** | −.01 | −.05 | −.25** | .13 |
| WASO | −.11 | .15 | .03 | .02 | .33** | −.06 | .09 | .19 | −.18 |
| Sleep qualitya | −.05 | .01 | .05 | −.15 | .39** | .17 | −.21* | −.22* | −.04 |
Note: IL, Interleukin; Phealth, Medical Outcomes Study-Short Form 36 subscale: Physical Health; FSQOL, Fox Simple Quality of Life; CES-D, Center for Epidemiologic Studies-Depression Scale; FACIT-Sp, Functional Assessment of Chronic Illness Therapy- Spiritual; ISEL, Interpersonal Support Evaluation List; WLQ, Work Limitations Question naire; CR, Care Recipient; POMS, Profile of Mood States; TST, total sleep time; WASO, wake after sleep onset.
a
Sleep quality item from Pittsburgh Sleep Quality Index. Lower score indicates better sleep quality.
*
p < .05.
**
p < .01.