Table 2.
β-Estimates for total cognitive score according to objectively measured PA
| Level of PA | Between-family analyses |
Within-family analyses |
||
|---|---|---|---|---|
| Model 1 (n = 726) | Model 2 (n = 726) | Age adjusted (n = 250 pairs) | Model 2 (n = 250 pairs) | |
| All | ||||
| MVPA, h | 0.18 (−0.51 to 0.88) | −0.30 (−1.00 to 0.39) | 0.51 (−1.18 to 2.20) | 0.20 (−1.64 to 2.04) |
| LPA, h | 0.22 (−0.07 to 0.52) | 0.30 (0.02 to 0.58) | 0.60 (−0.21 to 1.42) | 0.59 (−0.22 to 1.39) |
| SB, h | −0.20 (−0.41 to 0.01) | −0.21 (−0.42 to −0.003) | −0.42 (−1.00 to 0.15) | −0.40 (−1.00 to 0.19) |
| The mean daily MET | 0.94 (−1.35 to 3.24) | 0.21 (−2.15 to 2.57) | 3.20 (−2.59 to 8.98) | 2.40 (−3.98 to 8.51) |
| Daily step count (thousands) | 0.04 (−0.07 to 0.15) | −0.002 (−0.11 to 0.10) | 1.11 (−0.16 to 0.38) | 0.08 (−0.19 to 0.35) |
Abbreviations: MVPA, moderate to vigorous physical activity; LPA, light physical activity; SB, sedentary behavior; MET, metabolic equivalent; PA, physical activity.
NOTE: In between-family analyses, twin individuals were compared against each other. In within-family analyses, twins were compared to their co-twins, and intrapair differences in PA are regressed on intrapair differences in cognition. Model 1 is adjusted for age, sex, and the mean daily MET and SB also for the accelerometer wearing time. Model 2 is adjusted for age, sex, accelerometer wearing time (for SB and the mean daily MET), BMI in 2016, living condition, and years of education. The results written in bold are statistically significant.