There is no reference criterion that indicates whether this judgm

There is no reference criterion that indicates whether this judgment is accurate. One argument in favour of the use of the VAS is that it may be more sensitive to changes in assessments than the functional ability list (FAL). The FAL, rates physical work ability on an ordinal scale in 2, 3 or 4 categories, and will probably not reflect relatively small changes. We have chosen 1.2 cm as a relevant shift in judgment between the two assessments by the IP based on the results of our pilot study (average + 1 SD). Moreover, shifts between 9 and 13 mm are considered to be clinically relevant (Kelly 1998; Gallagher et al. 2001; Bodian et al. 2001; Ehrich et al. 2000). With our choice of 12 mm

we follow these values. By dichotomizing the outcome Nirogacestat order of the VAS, information is lost, namely the insight in the amount of shift in judgment of IPs. This could be a disadvantage, however, the research question was about whether IPs intentionally changed their judgment and not about the amount of change. The second topic for consideration is the suitability of FCE as a source of supplementary information in work-ability Stattic cell line assessments. While suggestions have been made previously to include FCE information in the disability screening process, we believe that the present study is the first one to actually measure the influence of this information on the judgment of IPs in a claim procedure (Lyth 2001; Liang et al. 1991).

The study of Oesch et al. should be mentioned in this context (Oesch et al. 2006). The setting of their study was the see more assessment of work capacity for decisions about medical fitness for work. The use of FCE assessments in that study improved the quality of medical fitness for work certificates after rehabilitation. The focus on a rehabilitation intervention is the main difference with the present study in Cell Cycle inhibitor which the assessment of physical work ability is the main outcome and not the evaluation of a rehabilitation programme. The similarity between both studies is the influence of FCE information on the judgment of IPs for work ability. This study was designed to allow the

effect of FCE information on IPs’ judgment of physical work ability to be studied in its natural setting—with the proviso that, in contrast to normal diagnostic routine, the IPs taking part in the present study could not refer claimants for an FCE assessment themselves. They were unaware whether claimants were participating in the study during the first work-ability assessment. No specific direction in terms of more of less physical work ability was found for the change in judgment between the initial and the second assessment: for some activities, the assessment tended to change from a higher to a lower ability, while for other activities the change tended to be in the reverse direction. This contrasts with the findings obtained in the study of Brouwer et al.

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