| Age at the time of study (years) |
|
|
| 11–15 |
6 |
8.7 |
| 16–20 |
16 |
23.2 |
| 21–25 |
47 |
68.1 |
| NYHA functional class (at the time of study) |
|
|
| I |
61 |
88.4 |
| II |
7 |
10.1 |
| III |
1 |
1.5 |
| IV |
– |
– |
| Prosthetic valve position |
|
|
| Mitral |
49 |
67.1 |
| Aortic |
9 |
12.3 |
| Mitral and aortic |
14 |
19.2 |
| Other |
1 |
1.4 |
| INR control |
|
|
| Optimal |
35 |
47.9 |
| Sub-optimal |
38 |
52.1 |
| Educational status of the patient |
|
|
| ≤ Primary education |
25 |
34.3 |
| Secondary education |
29 |
39.7 |
| Higher education |
19 |
26.0 |
| Parental education (best) |
|
|
| ≤ Primary education |
34 |
46.6 |
| Secondary education |
13 |
17.8 |
| Higher education |
26 |
35.6 |
| Distance from cardiology care clinic (km) |
|
|
| ≤ 150 |
55 |
75.3 |
| 151–300 |
4 |
5.5 |
| > 300 |
14 |
19.2 |
| Anticoagulant |
|
|
| Warfarin alone |
55 |
75.3 |
| Warfarin + aspirin |
18 |
24.7 |
| Drug supply source |
|
|
| Private |
19 |
26.0 |
| Public for payment |
36 |
49.3 |
| Public for free |
18 |
24.7 |
| Frequency of INR determination |
|
|
| Every month |
54 |
74.0 |
| Every 2 months |
4 |
5.5 |
| Quarterly or longer |
15 |
20.5 |
| Laboratory facility for INR |
|
|
| Private |
73 |
100 |
| Public |
– |
– |
| Missed doses (approximate) |
|
|
| Never |
30 |
41.1 |
| 1–2 doses per week |
34 |
46.6 |
| > 2 doses per week |
9 |
12.3 |
| Bleeding or thromboembolic complications |
7 |
9.6 |
