Estimating medication adherence from Electronic Health Records: comparing methods for mining and processing asthma treatment prescriptions

Table 2 Median and spread of CMA1 and CMA2 across time windows

Measure	Time Window	Median	Interquartile Range	Range
CMA1	All of follow-up	0.69	0.38 – 1.07	0.01—120
	Years	1.20	0.85 – 1.74	0.08—550
	Quarter-Years	2.40	1.67 – 3.70	0.23—550
CMA2	All of follow-up	0.36	0.12 – 0.76	< 0.01 – 150
	Years	0.86	0.50 – 1.28	0.03 – 360
	Quarter-Years	1.62	1.08 – 2.76	0.07 – 720

CMA1 and CMA2 have values in the range [0,∞), in which a value of 1 represents ‘perfect’ adherence and values over 1 represent ‘excessive’ adherence, or medication oversupply

ISSN: 1471-2288