Adherence to treatment guidelines: the association between stroke risk stratified comparing CHADS2 and CHA2DS2-VASc score levels and warfarin prescription for adult patients with atrial fibrillation

Table 2 Study Covariates by Warfarin Prescription for Adults with Atrial Fibrillation NAMCS 2010 Data (weighted n = 7669844)

Variables and factors		Warfarin prescription status^a
Variables and factors		% Other or No Medication	% Warfarin
Sex	Female	81.2	18.8
Sex	Male	82.9	17.1
Health Insurance Status	Have Health Insurance	82.2	17.8
Health Insurance Status	Do Not Have Health Insurance	79.6	20.4
Race	Caucasian	81.5	18.5
Race	Non-Caucasian	85.9	14.1
Poverty Percent In Patient Zip Code	<10%	83.9	16.1
Poverty Percent In Patient Zip Code	≥10%	79.1	20.9
Education Percent In Patient Zip Code	<20% University Graduates	77.4	22.6
Education Percent In Patient Zip Code	≥20% Codes University Graduates	84.4	15.6
Geographic Locale	Rural	83.3	16.7
Geographic Locale	Non-Rural	81.6	18.4
Primary HCP	Yes	79.7	20.3
	No	82.2	17.8
	Unknown	98.3	1.7
Individual CHADS₂ Scoring Components
Congestive heart failure	No	84.8	15.2
Congestive heart failure	Yes	65.6	34.4
Hypertension	No	91.8	8.2
Hypertension	Yes	77.4	22.6
Age	<75 Years	89.7	10.3
Age	≥75 Years	75.6	24.4
Diabetes	No	86.0	14.0
Diabetes	Yes	68.6	31.4
History Of Stroke\TIA	No	81.9	18.1
History Of Stroke\TIA	Yes	100.0	0.0
CHADS₂ Score	Low Score (0–1)	92.7	7.3
CHADS₂ Score	High Score (2 and higher)	74.9	25.1

^aThe differences for warfarin prescription status by each of the covariates was statistically significant (p < .05)

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