Biomarkers · Functional Fitness
Daily Movement (Wrist Accelerometer, MIMS)
Higher values carry lower risk. In NHANES 1999–2018 with linked mortality to 2019, each standard deviation is associated with a hazard ratio of 0.55. Reproduces in NHANES
In short
- Higher values carry lower risk
- Each standard deviation changes the hazard by a factor of 0.55 in 8,082 US adults (822 deaths)
- The median US adult sits at 13,075 MIMS/day
- Reproduces in NHANES
NHANES, our fit with 95% CIPublished curve
Hazard ratios relative to each curve's own reference value, so the two curves need not cross 1 at the same point. The dotted vertical line marks the NHANES median.
NHANES hazard per SD0.5595% CI 0.50–0.60 · 8,082 adults, 822 deaths
Published hazard ratio0.55per SD (95% CI 0.50–0.60) · NHANES 2011-2014 PAM participants aged 20-84 with >= 3 valid wear days, NCHS 2019 Linked Mortality Files (follow-up to 31 Dec 2019, median 6.8 y)
Where people sit
Population percentiles (MIMS/day) by sex and age band. Cycle or source as recorded in the catalogue.
| Sex | Age | 5th | 25th | Median | 75th | 95th | n | Cycle / source |
|---|---|---|---|---|---|---|---|---|
| All | 20-39 | 8,867 | 12,040 | 14,287 | 16,719 | 20,558 | 2,425 | NHANES 2011-2014 |
| All | 40-59 | 8,018 | 11,449 | 13,597 | 16,132 | 19,839 | 2,754 | NHANES 2011-2014 |
| All | 60+ | 5,934 | 8,945 | 11,210 | 13,515 | 17,482 | 2,847 | NHANES 2011-2014 |
| All | all | 7,119 | 10,772 | 13,143 | 15,775 | 19,606 | 8,026 | NHANES 2011-2014 |
| Men | 20-39 | 8,637 | 11,579 | 13,922 | 16,413 | 20,102 | 1,214 | NHANES 2011-2014 |
| Men | 40-59 | 7,418 | 10,888 | 13,079 | 15,626 | 19,677 | 1,264 | NHANES 2011-2014 |
| Men | 60+ | 5,736 | 8,712 | 10,602 | 12,693 | 16,167 | 1,374 | NHANES 2011-2014 |
| Men | all | 6,845 | 10,376 | 12,635 | 15,200 | 19,256 | 3,852 | NHANES 2011-2014 |
| Women | 20-39 | 9,287 | 12,374 | 14,840 | 16,913 | 20,824 | 1,211 | NHANES 2011-2014 |
| Women | 40-59 | 8,931 | 12,020 | 14,153 | 16,492 | 20,351 | 1,490 | NHANES 2011-2014 |
| Women | 60+ | 6,153 | 9,383 | 11,684 | 14,108 | 18,272 | 1,473 | NHANES 2011-2014 |
| Women | all | 7,555 | 11,262 | 13,589 | 16,127 | 19,905 | 4,174 | NHANES 2011-2014 |
Sources
- Hazard curve: Synthesized from the NHANES 2011-2014 per-SD HR computed in this project (HR=0.549 per SD of 3848 MIMS/day, 95% CI 0.501-0.602; age+sex adjusted Cox, 2019 LMF); log(HR)=beta*(x-median); pooled HR in every stratum
- NHANES 2011-2014 Physical Activity Monitor (PAXDAY) with 2019 Linked Mortality Files, computed in this project. National Center for Health Statistics: Physical Activity Monitor - Day (PAXDAY_G, PAXDAY_H), Demographics (DEMO_G, DEMO_H) and NCHS 2019 Public-use Linked Mortality Files; analysis in backend/add_nhanes_accelerometry.py.
- Empirical curve: our Cox model with age and sex, NHANES 1999–2018 with linked mortality to 2019.
Map Daily Movement (Wrist Accelerometer, MIMS) against another biomarker.