Table 1.
Participant Characteristics (n=120)
| Percentagea | |||
|---|---|---|---|
| Characteristic | Completers (n=85) | Noncompleters (n=35)b | Overall Anticoagulation Clinic Population (n=410) |
| Mean age (SD) [range] | 56.8 (15.4) [20-89] | 58.5 [20-83] | 61.4 [20-93] |
| % Male | 52 | 63 | 59 |
| Race, % | |||
| White, non-Hispanic | 72 | 54 | 62 |
| Black/African American | 24 | 43 | 30 |
| Other | 4 | 3 | 8 |
| Primary reason for anticoagulation, % | |||
| Atrial fibrillation/flutter | 43 | 54 | 42 |
| Venous thromboembolism | 42 | 20 | 44 |
| Heart valve | 14 | 17 | 14 |
| % Insured | 93 | 66 | 88 |
| % Medicare | 41 | 40 | |
| % Medicaid | 16 | 11 | |
| % Other insurance | 69 | 50 | |
| One-way travel distance (miles), mean (SD) [range]c | 16.9 (18.7) [0-100] | 15.6 (12.3) [1-45] | |
| Warfarin dose, mg/d, mean (SD) [range] | 6.2 (3.5) [0.7-15] | 6.1 (3.3) [1.4-13.6] | |
| Time in therapeutic range, %, mean (SD) [range] | 58.6 (20.1) [0-100] | 59.1 (21.9) [10-94] | |
| Proportion of INRs >4 (or >4.5 for those with target 2.5-3.5), %, mean (SD) [range] | 6.2 (8.6) [0-33] | 8.5 (10.1) [0-33] | |
| Employment status, % | |||
| Employed | 28 | ||
| Unemployed | 5 | ||
| Housewife/husband | 5 | ||
| Retired | 28 | ||
| Disabled | 26 | ||
| Student | 6 | ||
| Other | 5 | ||
| Annual household income range, % | |||
| 0 to $14,999 | 33 | ||
| $15,000 to $29,999 | 13 | ||
| $30,000 to $44,999 | 11 | ||
| $45,000 to $59,999 | 12 | ||
| $60,000 to $74,999 | 0 | ||
| $75,000 to $89,999 | 5 | ||
| $90,000 or greater | 26 | ||
| Education level completed, % | |||
| 7th grade or lower | 1 | ||
| 8th to 11th grade | 9 | ||
| High school graduate or GED | 21 | ||
| Some college or vocational school | 20 | ||
| 2-year college degree | 6 | ||
| 4-year college degree | 20 | ||
| Professional or graduate degree | 23 | ||
| General health (self-rated), % | |||
| Excellent | 8 | ||
| Very good | 21 | ||
| Good | 34 | ||
| Fair | 29 | ||
| Poor | 8 | ||
INR, international normalized ratio.
a
Percents were rounded to the nearest whole number and may not total 100 due to rounding.
b
Limited characteristics available for noncompleters because most information was obtained from the self-administered questionnaire that they did not return.
c
One-way travel distance was based on self-report for those returning the questionnaire. For noncompleters, we calculated one-way travel distance using MapQuest to determine the distance between our clinic and each patient's address of record.