Addendum: A novel estimate of biological aging by multiple fitness tests is associated with risk scores for age-related diseases

An Addendum on
A novel estimate of biological aging by multiple fitness tests is associated with risk scores for age-related diseases

by Manca A, Fiorito G, Morrone M, Boi A, Mercante B, Martinez G, Ventura L, Delitala AP, Cano A, Catte MG, Solinas G, Melis F, Ginatempo F and Deriu F (2023). Front. Physiol. 14:1164943. doi: 10.3389/fphys.2023.1164943

The formula by which Fitness Age is calculated was not reported in the section Results, Fitness age definition and components, below table 2:

“$FitAge=66.48-\frac{2.23*\left(TU{G}_{time}-6.69\right)}{1.38}-\frac{1.98*\left(Handgri{p}_{normalized}-0.37\right)}{0.11}-$$\frac{1.11*\left({6MWT}_{distance}-502.38\right)}{74.94}+0.95*\frac{\left({Fast10MWT}_{time}-4.75\right)}{0.93}+0.23*\frac{\left({4SST}_{time}-3.67\right)}{0.81}-0.19$$*\frac{\left({StrongerQuadStrength}_{normalized}-0.56\right)}{0.13}$

Where means (µ) and standard deviations (σ) were computed on this dataset:

TUG_time (s): µ = 6.69; σ = 1.38

Handgrip_normalized (by bodyweight in kg): µ = 0.37; σ = 0.11

6MWT_distance (m): µ = 502.38; σ = 74.94

fast10MWT_time (s): µ = 4.75; σ = 0.93

4SST_time (s): µ = 3.67; σ = 0.81

StrongerQuadStrength_normalized (by bodyweight in kg): µ = 0.56; σ = 0.13”

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