Table 3.

Characteristics of residents with atrial fibrillation: warfarin users and non-users

Characteristics	NNHSa			AnalytiCare
	User (n = 502) (%)	Non-user (n = 952) (%)	p valueb	User (n = 1,674) (%)	Non-user (n = 2,083) (%)	p valueb
Demographics
Age, year (<75 year referent)	11	12	0.615	20	17	<0.001
75–84	33	30		43	33
≥85	57	58		37	50
Female	72	69	0.344	64	63	0.273
Race/ethnicity (White referent)	92	89	0.010	85	81	0.006
Black	4	7		8	10
Hispanic	3	1		6	7
Other	1	3		2	2
Physical functioning
ADL assessment from MDS using Carpenter scorec [25] (independent, score <14 referent)	41	35	0.050	29	26	<0.001
Moderate (score ≥14 and <21)	33	33		55	51
Dependent (score ≥21)	26	32		16	22
Hospice/<6 months to live	1	4	0.005	1	3	<0.001
CHADS2 stroke risk index [6]
0	1	3	0.021	1	1	0.044
1	17	21		10	13
2	31	35		28	31
3	30	26		29	28
4	13	11		19	16
5	6	4		9	8
6	2	1		3	3
Mean (±SE) CHADS2 score	2.6 (0.07)	2.4 (0.04)	0.001	2.9 (0.03)	2.8 (0.03)	0.003
Comorbid conditions not elsewhere listed as a stroke or bleeding risk factor
Deep vein thrombosis	6	2	0.004	7	4	<0.001
Peripheral vascular disease	11	12	0.671	19	18	0.200
Depression	35	33	0.374	47	49	0.148
Emphysema/COPD	18	20	0.390	30	29	0.288
Cancer	6	9	0.053	10	9	0.385

ADL activities of daily living, CHADS ₂ Cardiac Failure, Hypertension, Age, Diabetes, [and] Stroke [Doubled], COPD chronic obstructive pulmonary disease, MDS Minimum Data Set, NNHS National Nursing Home Survey, SE standard error

^aSampling weights were applied to NNHS data to determine population estimates and frequencies

^bChi-square test (proportions), t test (mean)

^cScore range 0–28, where a higher score indicates greater physical functioning dependence (i.e. worsened ADL performance)