Table 1.
Characterisation of obesity trait data in longitudinal records curated from UK Biobank assessment centre visits and linked general practitioner (GP) records
| Trait | Sex | Number of individuals | Number of obs. | Mean number of repeat obs. (SD) | Mean length of follow-up, years (SD) | Mean age at first obs., years (SD) | Median trait value at first obs. (IQR) |
|---|---|---|---|---|---|---|---|
| BMI, kg/m2 | F | 88,243 (54.4%) | 696,984 | 7.90 (7.34) | 13.7 (6.63) | 48.6 (9.68) | 24.6 (22.2, 27.9) |
| BMI, kg/m2 | M | 73,965 (45.6%) | 581,161 | 7.86 (7.12) | 12.8 (6.55) | 50.1 (9.59) | 26.1 (24.0, 28.7) |
| Weight, kg | F | 96,625 (54.6%) | 816,885 | 8.45 (8.33) | 13.9 (6.62) | 48.3 (9.63) | 65.0 (59.0, 74.0) |
| Weight, kg | M | 80,473 (45.4%) | 666,258 | 8.28 (7.82) | 12.9 (6.57) | 50.0 (9.57) | 81.6 (73.8, 90.0) |
BMI body mass index, obs. observation, S.D. standard deviation, I.Q.R. inter-quartile range.