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Flow of study participants from time point 2 (T2) to time point 3 (T3).
JoCoOA= Johnston County Osteoarthritis Project; DSN= disc space narrowing; LBP= lower back pain.
*Covariates: age, race, sex, BMI, knee OA, having 2+ comorbidities (CVD, hypertension, diabetes, liver disease, cancer, depression), NSAIDs.
