Table 4: 54 UK Biobank phenotype variables.
Variables for physical exercises in blue were reduced to 8 principal components by PCA. Variables in red were excluded in brain-age delta analysis. Variables without IDs were created by R.F.S. based on the original variables and not included in the original UK Biobank dataset.
| Variable ID | Variable Name |
|---|---|
| f399 2 2 | number of incorrect matches in round |
| f400 2 2 | time to complete round |
| f699 2 0 | length of time at current address |
| f864 2 0 | number of daysweek walked 10 minutes |
| f874 2 0 | duration of walks |
| f884 2 0 | number of daysweek of moderate physical activity 10 minutes |
| f894 2 0 | duration of moderate activity |
| f904 2 0 | number of daysweek of vigorous physical activity 10 minutes |
| f914 2 0 | duration of vigorous activity |
| f943 2 0 | frequency of stair climbing in last 4 weeks |
| f971 2 0 | frequency of walking for pleasure in last 4 weeks |
| f981 2 0 | duration walking for pleasure |
| f991 2 0 | frequency of strenuous sports in last 4 weeks |
| f1001 2 0 | duration of strenuous sports |
| f1011 2 0 | frequency of light diy in last 4 weeks |
| f1021 2 0 | duration of light diy |
| f1050 2 0 | time spend outdoors in summer |
| f1060 2 0 | time spent outdoors in winter |
| f1070 2 0 | time spent watching television tv |
| f1080 2 0 | time spent using computer |
| f1160 2 0 | sleep duration |
| f1438 2 0 | bread intake |
| f1488 2 0 | tea intake |
| f1498 2 0 | coffee intake |
| f1558 2 0 | alcohol intake frequency |
| f2139 2 0 | age first had sexual intercourse |
| f2217 2 0 | age started wearing glasses or contact lenses |
| f2624 2 0 | frequency of heavy diy in last 4 weeks |
| f2634 2 0 | duration of heavy diy |
| f3637 2 0 | frequency of other exercises in last 4 weeks |
| f3647 2 0 | duration of other exercises |
| f4288 2 0 | time to answer |
| f4609 2 0 | longest period of depression |
| f20016 2 0 | fluid intelligence score |
| f20023 2 0 | mean time to correctly identify matches |
| f20128 2 0 | number of fluid intelligence questions attempted within time limit |
| f21003 2 0 | age when attended assessment centre |
| f31 0 0 | sex |
| total hours walked 10 minutes | |
| total hours moderate physical activity 10 minutes | |
| total hours vigorous physical activity 10 minutes | |
| total hours of walking for pleasure in last 4 weeks | |
| total hours of strenuous sports in last 4 weeks | |
| total hours of other exercises in last 4 weeks | |
| total hours of light diy in last 4 weeks | |
| total hours of heavy diy in last 4 weeks | |
| number of physical activities wrt walking for pleasure | |
| years since first sexual intercourse | |
| years since started wearing glasses | |
| log time to answer | |
| inverse log duration screen displayed | |
| inverse log number of attempts | |
| log pm score | |
| fluid intelligence interaction |