Figure 4.

OR for incident infarct by PTH level from visit 3 to Brain MRI visit

Curves represent adjusted change (solid lines) and their 95% confidence intervals (dashed lines) based on restricted cubic splines for PTH and brain MRI outcomes with knots at the 5^th, 35^th, 65^th and 95^th percentiles of their sample distributions. The reference values (diamond dots) were set at the 50^th percentile level (41.7 pg/ml). Models were adjusted for age, sex, race, education, body mass index, smoking status, alcohol drinking, and physical activity