Fig. 2From: Chronic neck pain is associated with increased mortality in individuals with osteoarthritis: results from the NHANES database prospective cohort studyKaplan–Meier curve of survival probability of OA patients comparing with chronic neck pain and no chronic neck pain. The red line represented the OA patients with chronic neck pain, while the blue line represented the OA patients without chronic neck pain (p < 0.05)Back to article page