Table 1.
Patient demographics and descriptive variables.
| Included sample (n = 135) | Excluded sample (n = 52) | t/χ 2 | df | P | |||
|---|---|---|---|---|---|---|---|
| Mean | (SD) | Mean | (SD) | ||||
| Age (years) | 72.9 | (9.7) | 76.5 | (8.8) | 2.56 | 109.1a | 0.01 |
| Education (years) | 13.9 | (3.0) | 13.1 | (2.6) | −1.21 | 156 | >0.05 |
| Race (% White) | 62.2% | 61.5% | 0.01 | 1 | >0.05 | ||
| GDS Score | 1.5 | (1.4) | 1.4 | (1.4) | −0.29 | 182 | >0.05 |
| GPM Score | 50.0 | (27.8) | 46.1 | (29.5) | −0.78 | 175 | >0.05 |
| CIRS Total Score | 22.0 | (5.4) | 23.4 | (5.6) | 1.44 | 175 | >0.05 |
| BMI | 27.0 | (5.5) | 28.2 | (10.5) | 0.74 | 50.88a | >0.05 |
| Sleep Duration (% of respondents) | 0.37 | 179 | >0.05 | ||||
| Less than 5 h | 32.9% | 32.6% | |||||
| 5 to 6 h | 20.0% | 21.7% | |||||
| 6 to 7 h | 20.0% | 21.7% | |||||
| Greater than 7 h | 28.1% | 23.9% | |||||
| CRP [median (25%ile, 75%ile)] | 19.0 | (4.4, 59.1) | 19.9 | (5.8, 65.4) | 0.22 | 183 | >0.05 |
| sICAM [median (25%ile, 75%ile)] | 263 | (221, 337) | 247 | (197, 330) | −1.39 | 183 | >0.05 |
| TNFα [median (25%ile, 75%ile)] | 1.9 | (1.5, 2.4) | 1.9 | (1.4, 2.6) | −0.46 | 183 | >0.05 |
| IL6 [median (25%ile, 75%ile)] | 9.4 | (5.3, 16.6) | 10.7 | (5.4, 20.5) | 0.53 | 185 | >0.05 |
| MMSE Score | 25.8 | (3.4) | 24.5 | (4.3) | −1.93 | 76.62a | >0.05 |
Race dichotomously coded as non-Hispanic white = 1, all other = 0; GDS, Geriatric Depression Scale, modified 5-item version; GPM, Geriatric Pain Measure; CIRS, Cumulative Illness Rating Scale; BMI, body mass index; CRP, C-reactive protein (mg/L); sICAM, soluble Intercellular Adhesion Molecule (ng/mL); TNFα, Tumor Necrosis Factor-alpha (pg/mL); IL6, Interleukin-6 (pg/mL).
a
degrees of freedom and t-statistic were adjusted for non-homogeneity of variance.