TY - JOUR T1 - Measuring locomotor disability: a new scoring mechanism for some familiar items JF - Journal of Epidemiology and Community Health JO - J Epidemiol Community Health SP - 67 LP - 67 DO - 10.1136/jech.2009.096727o VL - 63 IS - Suppl 2 AU - S. Muller AU - E. Thomas AU - G. Peat Y1 - 2009/10/01 UR - http://jech.bmj.com/content/63/Suppl_2/67.abstract N2 - Locomotor disability is a critical measure for studying functional decline in later life and has featured in several major epidemiological studies. Yet measurement has mostly been confined to single items or ordinal scales rather than truly unidimensional measures with interval properties, thereby limiting the detection and interpretation of change in locomotor disability over time. Our aim was to combine items from the well-known SF-36 Physical Functioning Scale (PF-10) into a single score using Rasch analysis and test the properties … ER -