Table 1 Characteristics of participants from the MRC National Survey of Health and Development with data from accelerometry and cognitive tests at age 69, 2015 (n = 558)
|  | Men (n = 289) | Women (n = 269) |
|---|---|---|
Cognitive test scores: mean (SD) | ||
 Letter search task | 253.2 (72.5) | 274.2 (75.0) |
 Word learning test | 22.0 (5.8) | 24.1 (6.0) |
 Addenbrooke’s Cognitive examination-III | 92.1 (5.2) | 92.6 (5.4) |
Vertical acceleration peaks: Median count (25th, 75th) | ||
 Low magnitude impacts (0.5 ≤ g < 1.0) | 15,909 (7800, 25,888) | 13,513 (7228, 23,301) |
 Medium magnitude impacts (1.0 ≤ g < 1.5) | 968 (305, 2691) | 667 (243, 1753) |
 Higher magnitude impacts (≥ 1.5 g) | 101 (42, 315) | 70 (29, 192) |
Adult socioeconomic position: N (%) | ||
 professional and intermediate | 170 (59.2) | 131 (48.7) |
 skilled non-manual | 30 (10.5) | 94 (34.9) |
 skilled manual | 69 (24.0) | 13 (4.8) |
 semi-skilled and unskilled manual | 18 (6.3) | 31 (11.5) |
BMI (kg/m2): mean (SD) | 27.5 (3.9) | 27.2 (4.5) |
Depression score from the GHQ-28 score: mean (SD) | 0.58 (1.8) | 0.79 (1.8) |
Childhood cognitive ability: mean (SD) | 0.06 (1.02) | −0.06 (0.98) |