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Open Access Highly Accessed Research article

A Frailty Instrument for primary care: findings from the Survey of Health, Ageing and Retirement in Europe (SHARE)

Roman Romero-Ortuno*, Cathal D Walsh, Brian A Lawlor and Rose Anne Kenny

BMC Geriatrics 2010, 10:57  doi:10.1186/1471-2318-10-57

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Correction: predicted DFS formula for males

Roman Romero-Ortuno   (2012-03-07 15:01)  Trinity College Dublin email

Please note:

On the final online version of the article (, there is a typographical error on the predicted DFS formula for males.

The male formula needs to have the negative value "-0.4653" as the Grip strength multiplier, as shown below:

DFS (males) = (2.280336 * Fatigue - 0.592393) * 0.3762 + (4.058274 * Loss of
appetite - 0.263501) * 0.3130 + (0.092326 * Grip strength - 3.986646) * -0.4653 +
(3.098226 * Functional difficulties - 0.365971) * 0.6146 + (1.005942 * Physical
activity - 1.571803) * 0.4680

The correct formula (as shown above) can also be seen in the final pre-publication version of the article (Resubmission - Version 2:

This correction does not affect the online SHARE-FI calculator (Additional file 2,, which is based on the correct formula.

Competing interests



Grip strength measurement protocol

Roman Romero-Ortuno   (2011-07-06 17:39)  Department of Medical Gerontology, Trinity College Dublin email

Note from the authors:

In SHARE, handgrip strength (Kg) was assessed using a Smedley dynamometer (S Dynamometer, TTM, Tokyo, 100 Kg), according to the following measurement protocol:

"Participants were instructed to stand (preferably) or sit, with the elbow at 90°, the wrist in neutral position, keeping the upper arm tight against the trunk, and the inner lever of the dynamometer adjusted to suit the hand; and they were then instructed to squeeze as hard as possible for a few seconds"

For more information, please see: Mohd Hairi F, Mackenbach JP, Andersen-Ranberg K, Avendano M. Does socio-economic status predict grip strength in older Europeans? Results from the SHARE study in non-institutionalised men and women aged 50+. J Epidemiol Community Health. 2010;64:829-37.

Competing interests



Translated SHARE-FI calculators

Roman Romero-Ortuno   (2011-05-23 15:59)  Department of Medical Gerontology, Trinity College Dublin email

Note from the authors:

Please note that translated versions of the SHARE-FI calculators can be found on:

Roman Romero-Ortuno

Competing interests



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