Question

Problem #2: The following table displays medication adherence (defined as the percent of doses taken over the past month measured to the nearest whole number), classified by the time since initiation of therapy: Percent of Doses Taken Time Since Initiation of Therapy <70% 70%-89% 90%-100% Less than 3 months Between 3 and 12 months More than 12 months a. [10 Points What proportion of patients takes 70% or more of the prescribed doses? vints Given that a patient is on medication therapy for more than 12 months, what is the probability that the patient takes 90% or more of the prescribed doses?

Answer 1

	<70 %	70-89 %	90-100 %	total
<3 months	18	58	24	100
3-12 months	33	40	27	100
>12 months	21	27	52	100
total	72	125	103	300

a)

Proportion of patients take 70% or more of the prescribed doses =P(70-89%)+P(90-100%)

=(125+103)/300= 0.76

b)

P( 90-100% given more than 12 months )= 52/100 =0.52