Fig. 4From: The associations between psychological distress and healthcare use in patients with non-cardiac chest pain: does a history of cardiac disease matter?a + b Cardiac anxiety as a function of depressive symptoms and fear of body sensations (BSQ). Solid line indicates non-cardiac chest pain patients with history of, and dashed line chest pain patients with no history of cardiac disease. The lines are smoothed by means of distance-weighted least squares regression (DWLS)Back to article page