JAMA has a review of "Diagnosis and Treatment of Hip and Knee Osteoarthritis". Affecting 240 million people worldwide, >32 million in the US. OA Risk factors include age, female, obesity, genetics, & trauma/injury. OA pts have more comorbidities https://t.co/fGgTLWj8Hc https://t.co/65hpkI8oo0