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(a) Percentage of patients receiving LT4 prescriptions for hypothyroidism fit to a model with a knot at year 2012 using spline regression analysis (95% confidence limits are displayed). (b) Percentage of patients receiving LT4 prescriptions given without a diagnosis of hypothyroidism fit to a linear model (95% confidence limits are displayed).
Hypo, patients with a diagnosis of hypothyroidism; LT4, levothyroxine; Non-hypo, patients without a diagnosis of hypothyroidism.
