TABLE 1.
Descriptions of the demographic characteristics of NHANES (2011–2014) participants.
| Continuous variables | Mean ± SE |
|---|---|
| Score of the CERAD Immediate Recall | 6.55 ± 0.08 |
| Score of the CERAD Delayed Recall | 6.19 ± 0.10 |
| Score of the Animal Fluency Test | 18.15 ± 0.19 |
| Score of the Digit Symbol Substitution Test | 52.28 ± 0.58 |
| Recreational activity (min/week) | 146.31 ± 9.76 |
| Work activity (min/week) | 276.67 ± 28.05 |
| Sleep duration (h/day) | 7.17 ± 0.03 |
| Systemic immune‐inflammation index (109/L) | 565.75 ± 10.64 |
| Category variables | % |
|---|---|
| Systemic immune‐inflammation index (category) | |
| <544.64 | 60.44 |
| ≥544.64 | 39.56 |
| Sleep duration (category) | |
| ≥7 (Normal sleep) | 52.30 |
| ≥6 (Mild short‐sleep) | 32.44 |
| <6 (Severe short‐sleep) | 15.25 |
| Age | |
| <65 | 32.23 |
| [65, 72) | 35.61 |
| ≥72 | 32.16 |
| Sex | |
| Male | 45.76 |
| Female | 54.24 |
| Race/ethnicity | |
| Non‐Hispanic White | 79.99 |
| Non‐Hispanic Black | 8.11 |
| Mexican American | 3.42 |
| Other Race/ethnicity | 8.48 |
| Body mass index (kg/m2) | |
| <25 | 26.03 |
| [25, 30) | 36.16 |
| ≥30 | 37.81 |
Note: Weighted Mean ± SE for continuous variables and weighted percentage for category variables.