John Elflein
John Elflein is Statista's research expert for topics concerning health, diseases, and medical professionals in the United States and worldwide. In the past year he has written and published reports on topics such as the opioid epidemic, obesity, and mental health issues, and provided extensive coverage of the COVID-19 pandemic.
Latest statistics
Percentage of young people aged 5 to 19 years worldwide who were overweight or obese in 2020 and forecasts to 2035
Number of young people aged 5 to 19 years worldwide who were overweight or obese in 2020 and forecasts to 2035 (in millions)
Percentage of adults aged 20 years and older worldwide who were overweight or obese in 2020 and forecasts to 2035
Number of adults aged 20 years and older worldwide who were overweight or obese in 2020 and forecasts to 2035 (in billions)
Prevalence of doctor-diagnosed arthritis among U.S. adults in 2022, by urbanization level