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Table 1 Descriptive measures of the final sample

From: The relationship between physical activity, apolipoprotein E ε4 carriage, and brain health

Variable Whole sample Carriers Non-carriers p value
Sex (M; F) 32; 75 8; 25 24; 50 0.49
Age 60.48 ± 8.10 59.36 ± 7.46 60.97 ± 8.36 0.39
Education 4.62 ± 0.68 4.61 ± 0.75 4.622 ± 0.63 0.86
MMSE 29.26 ± 0.84 29.33 ± 0.89 29.23 ± 0.82 0.42
BMI 25.03 ± 3.61 25.01 ± 3.82 25.04 ± 3.55 0.90
TPA 0.0125 ± 0.0117 0.0109 ± 0.0107 0.0133 ± 0.0122 0.48
MVPA 36.34 ± 21.12 33.12 ± 17.64 37.77 ± 22.47 0.54
Forward digits 5.95 ± 1.22 5.88 ± 1.22 5.99 + 1.23 0.75
Reverse digits 4.50 ± 1.36 4.67 ± 1.65 4.43 ± 1.22 0.55
Logical mem. units 18.79 ± 11.13 20.97 ± 11.87 17.86 ± 10.76 0.25
Logical mem. gist 15.74 ± 10.87 13.69 ± 8.14 16.63 ± 11.80 0.52
Anxiety 1.71 ± 0.84 1.86 ± 2.37 1.65 ± 2.05 0.84
Depression 1.24 ± 1.62 1.27 ± 1.44 1.23 ± 1.70 0.70
Total GM 545,939 ± 51,206 546,825 ± 66,891 545,538 ± 42,833 0.80
Hippocampus 7549 ± 834 7583 ± 954 7533 ± 780 0.81
Amygdala 2730 ± 470 2721 ± 573 2734 ± 420 0.51
Precuneus 16,337 ± 2002 16,403 ± 2491 16,306.83 ± 1757 0.87
Global FA 0.4355 ± 0.017362 0.4395 ± 0.01645 0.4336 ± 0.0176 0.11
Uncinate 0.4378 ± 0.0238 0.4387 ± 0.0232 0.4374 ± 0,0242 0.87
Parahippocampus 0.4355 ± 0.0173 0.4177 ± 0.0315 0.4145 ± 0.0289 0.71
  1. Mean values ± standard deviation for all matching variables as well as variables used for correlation analyses. These include sex (where M stands for male and F for female); age (in years); education (in terms of educational level on a 0—illiterate—to 5—postsecondary education—scale); Mini-Mental State Examination (MMSE); body mass index (BMI); total physical activity (TPA, normalized by actigraphy wear time); daily average of moderate to vigorous physical activity (MVPA, in minutes); working memory (Forward and Reverse Digit Span—forward and reverse digits); episodic memory (Logical Memory II—delayed recall; for units and gist—logical mem. units and gist); anxiety (Goldberg’s test); depression (Geriatric Depression Scale); total gray matter volume (GM, in cubic millimeter); hippocampus, amygdala, and precuneus volumes (left plus right, in cubic millimeter); global fractional anisotropy (FA); and uncinate and parahippocampal fasciculus fractional anisotropy (left and right weighted arithmetic mean). Results are displayed for the whole sample and also for each subsample of interest (APOE ε4 carriers and non-carriers). p values for the Mann-Whitney and Fisher (sex) tests are also shown. No significant between-group differences arose across all comparisons