Table 1 Descriptive baseline characteristics
From: Association between circadian physical activity patterns and mortality in the UK Biobank
Variable | PA pattern sample (N = 96,351) | Mortality sample (N = 84,877) |
|---|---|---|
Sex (%) | ||
Female | 54,272 (56.3) | 47,081 (55.5) |
Male | 42,079 (43.7) | 37,796 (44.5) |
Age at baseline (sd) | 56.16 (7.82) | 55.84 (7.83) |
Age at accelerometry (sd) | 61.86 (7.85) | 61.51 (7.86) |
Age at exit (sd) | 68.67 (7.78) | 68.35 (7.79) |
Body mass index (sd) | 26.72 (4.53) | 26.70 (4.51) |
Diet score (sd) | 3.71 (1.33) | 3.70 (1.33) |
Socio-economic status (sd) | -1.73 (2.82) | -1.72 (2.82) |
Sedentary behavior (sd) | 4.29 (2.46) | 4.29 (2.47) |
Smoking status (%) | ||
Never | 54,872 (57.0) | 48,947 (57.7) |
Former | 34,574 (35.9) | 30,069 (35.4) |
Current | 6,660 (6.9) | 5,861 (6.9) |
Pack years of smoking (sd) | 20.25 (16.66) | 6.49 (13.24) |
Alcohol drinking status (%) | ||
Never | 2,789 (2.9) | 2,455 (2.9) |
Former | 2,654 (2.8) | 2,318 (2.7) |
Current | 90,831 (94.3) | 80,104 (94.4) |
Alcohol intake in grams/day (sd) | 16 (17) | 16 (17) |
Qualifications (%) | ||
College or university degree | 41,407 (43.0) | 37,088 (43.7) |
A levels/AS levels or equivalent, NVQ or HND or HNC or equivalent, Other professional qualifications | 22,599 (23.5) | 20,101 (23.7) |
O levels/GCSEs or equivalent, CSEs or equivalent | 23,419 (24.3) | 20,812 (24.5) |
None of the above | 7,973 (8.3) | 6,876 (8.1) |
Diabetes (%) | ||
No | 93,737 (97.3) | 82,787 (97.5) |
Yes | 2,614 (2.7) | 2,090 (2.5) |
Cardiovascular disease (%) | ||
No | 91,634 (95.1) | 80,920 (95.3) |
Yes | 4,717 (4.9) | 3,957 (4.7) |