Associations between body mass index and foot joint pain in middle-aged and older women: a retrospective analysis of a longitudinal cohort

Methods A retrospective, longitudinal, cohort study design was used to investigate the relationship between patient reported foot joint pain (FJP), body mass index (BMI) and age over time. Data has been prospectively collated (20 years) for women from the general population, the ‘1000 Women Study’. From a baseline of 1003 female participants, data from 639 women (64%) were reviewed at years (Y) 10 and 15.