A new study on the relationship between mobility and income has shown that better mobility was strongly associated with higher income and longer working years in adults. The findings, from researchers at the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), part of the National Institutes of Health, also suggest that maintaining mobility was linked to greater earnings over time. The study was published in Clinical Orthopaedics and Related Research.
Timothy Bhattacharyya, M.D., head of the NIAMS Clinical and Investigative Orthopaedics Surgery Unit, led the study. Bhattacharyya and colleagues analyzed data from the federally supported Health and Retirement Study (HRS).
Bhattacharyya and his team first measured the association between household income and mobility in more than 19,000 HRS participants who responded to the survey in 2016. Participants were assigned to one of six mobility levels based on their ability to complete a series of tasks – walking several blocks, walking one block, walking across a room, climbing several flights of stairs, and climbing one flight of stairs. A level 5 represented “unrestricted” mobility, while a level 0 indicated difficulty with all the mobility tasks.
“For every level drop in mobility, participants faced a reduction of more than $3,000 in annual income,” said Bhattacharyya.
Next, the researchers evaluated the association between maintaining mobility and income. They identified a second group of individuals with unrestricted mobility who responded to the survey a total of three times: once in 2000 and two additional times by 2010. Those who maintained their mobility over the decade had incomes that were $6,500 higher than their less-mobile counterparts and were more likely to be employed.
Last, the researchers explored the role of exercise in maintaining mobility in a cohort of participants who were 60-80 years old in 2012. The researchers conducted follow-up assessments at two and four years from the initial response. Those who were able to maintain mobility after the age of 55 had a 19-point higher likelihood of maintaining an active working status. Engaging in exercise just once per week significantly boosted mobility scores over time.