Data from the UK Labour Force Survey (LFS) are used to examine two methodological issues in the analysis of the relationship between age and work-related health. First, the LFS is unusual in that it asks work-related health questions to those who are not currently employed. This facilitates a more representative analysis than that which is constrained to focus only on those currently in work. Second, information in the LFS facilitates a comparison of work-related health problems that stem from current employment to a more encompassing measure that includes those related to a former job. We find that accounting for each of these sources of bias increases the age work-related health risk gradient, and suggest that ignoring such effects will underestimate the work-related health implications of current policies to extend working lives.