• 1. Introduction
  • 2. Longitudinal studies of disability
  • 3. Data and methodology
  • (i) Data and definitions
  • (ii) Approaches to describing dynamics
  • 4. Results
  • (i) Disability trajectories
  • (ii) Comparison between cross-sectional and longitudinal disability measures
  • (iii) Duration of spells beginning within the panel
  • 5. Discussion
  • Appendix 1: Possible impact of unobserved disability before or after the panel
  • References