Table 1:
Characteristics and Participation Measures of Study Clinics by Randomization Group: the VA MI-Plus Study, 2002–2008
| Characteristic | Overall (N=168) |
Intervention Group (N=84) |
Control Group (N=84) |
P-value |
|---|---|---|---|---|
| Parent facility designated as a health services research program, n (%) | 39 (23) | 19 (23) | 20 (24) | 0.8 |
| Urban location,* n (%) | 139 (84) | 70 (84) | 69 (84) | 0.97 |
| Geographic region, n (%) | 0.7 | |||
| New England/Mid-Atlantic | 48 (28) | 28 (33) | 20 (24) | |
| Midwest | 54 (32) | 25 (30) | 29 (34) | |
| South | 49 (29) | 23 (27) | 26 (31) | |
| West | 14 (8) | 7 (8) | 7 (8) | |
| Puerto Rico/Virgin Islands | 3 (2) | 1 (1) | 2 (2) | |
| Number of providers, n (%) | 0.3 | |||
| 1–2 | 53 (32) | 29 (34) | 24 (28) | |
| 3–4 | 55 (33) | 30 (36) | 25 (30) | |
| ≥5 | 60 (36) | 25 (30) | 35 (42) | |
| Median† (inter-quartile range, IQR) | 3 (2–6) | 3 (2–5) | 4 (2–7) | 0.2 |
| Participation Measure† | ||||
| Providers per clinic who participated (logged on to the website), % (IQR) | 50.0 (33.3–75.0) |
58.6 (39.2–100) |
50.0 (33.3–66.7) |
0.03 |
| Number of website visits per provider per clinic, median (IQR) | 1.7 (0.6–3.7) |
3.7 (2.0–6.8) |
0.8 (0.5–1.5) |
<0.001 |
| Number of website pages accessed per provider per clinic, median (IQR) | 17.9 (4.5–62.4) |
57.7 (29.2–99.5) |
6.2 (2.2–11.3) |
<0.001 |
| Number of months from first logon to study closure, median (IQR)‡ | 16.5 (12.5–19.1) |
17.0 (13.3–19.3) |
15.8 (11.0–18.9) |
0.2 |
| Number of months between first and last logon (active participation), median (IQR)‡ | 2.7 (0.0–11.5) |
7.6 (0.7–14.2) |
0.0 (0.0–3.8) |
<0.001 |
| Providers with active participation of ≥12 months, %‡ | 23.4% | 36.1% | 10.2% | <0.001 |
*
Urban/rural location designation was not available for the 3 clinics in Puerto Rico & Virgin Islands.
†
P-values from Wilcoxon rank sum test where medians are given, else from chi-square.
‡
Participation measured among providers who enrolled.