Table 3.
Adjusted associations of tertiles of percent activity time by bout length with cognition outcomes, beta-coefficient (SE).
| n-back | DSC | Task switching | Flanker | HVLT | Global composite | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| % activity time | One-back (n = 1,156) | Two-back (n = 1,074) | (n = 1,256) | No (n = 1,110) | Yes (n = 1,110) | Congruent (n = 1,213) | Incongruent (n = 1,213) | Immediate (n = 1,257) | Delayed (n = 1,251) | (n = 1,258) |
| Daily total activity volume (≥1-min bouts) | ||||||||||
| A. Low | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. |
| B. Medium | <0.001 (0.011) | 0.012 (0.015) | 2.104 (0.827)∗ | -63.201 (72.822) | -62.972 (91.951) | -16.206 (15.502) | -13.372 (22.447) | 0.621 (0.351) | 0.113 (0.191) | 0.083 (0.046) |
| C. High | 0.011 (0.013) | -0.001 (0.016) | 2.030 (0.854)∗ | -86.220 (74.541) | -117.952 (94.122) | -24.541 (15.993) | -18.602 (23.158) | 0.385 (0.363) | 0.252 (0.197) | 0.085 (0.047) |
| Daily ≥2-min activity bouts | ||||||||||
| E. Low | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. |
| F. Medium | 0.005 (0.013) | 0.018 (0.016) | 2.514 (0.826)∗∗ | -42.912 (72.537) | -49.930 (91.572) | -14.145 (15.482) | -11.805 (22.420) | 1.001 (0.350)∗∗ | 0.213 (0.191) | 0.105 (0.045)∗ |
| G. High | 0.016 (0.013) | 0.005 (0.016) | 1.849 (0.849)∗ | -99.048 (74.116) | -141.906 (93.566) | -27.796 (15.895) | -23.111 (23.019) | 0.476 (0.360) | 0.236 (0.196) | 0.100 (0.047)∗ |
| Daily ≥5-min activity bouts | ||||||||||
| I. Low | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. | Ref. |
| J. Medium | -0.006 (0.013) | 0.003 (0.015) | 2.286 (0.825)∗∗ | -77.574 (72.30) | -50.018 (91.341) | -24.840 (15.399) | -41.153 (22.278) | 1.045 (0.350)∗∗ | 0.386 (0.190)∗ | 0.115 (0.045)∗ |
| K. High | 0.019 (0.013) | 0.015 (0.016) | 2.008 (0.845)∗ | -107.309 (73.880) | -112.888 (93.326) | -23.873 (15.850) | -28.538 (22.931) | 0.696 (0.358) | 0.387 (0.194)∗ | 0.114 (0.046)∗ |
DSC, digit symbol coding; HVLT, Hopkins Verbal Learning Test; Ref, reference. Models adjusted for age, sex, race/ethnicity, education, income, marital status, body mass index (kg/m2), smoking status, sleep quality, perceived stress, living with two or more morbid conditions. ∗p < 0.05; ∗∗p < 0.01; ∗∗∗p < 0.001.