BASELINE SPECIALTY CLINIC CHARACTERISTICS.
| Intervention (N = 26) |
Control (N = 24) |
|||
|---|---|---|---|---|
| n (%) | n (%) | p-value a | ||
| Site geographic location b | Northeast | 6 (23.1) | 6 (25.0) | 0.58 a |
| Southeast | 7 (26.9) | 8 (33.3) | ||
| Midwest and Northwest | 3 (11.5) | 5 (20.8) | ||
| Southwest and West | 10 (38.5) | 5 (20.8) | ||
| Percent minorities enrolled in previous trials at the site b,c | 0%-<10% | 7 (26.9) | 7 (29.2) | 0.63 a |
| 10%-<20% | 6 (23.1) | 3 (12.5) | ||
| ≥ 20% | 9 (34.6) | 11 (45.8) | ||
| data N/Ad | 4 (15.4) | 3 (12.5) | ||
| % minorities ≤ 30 miles of siteb,e | 17%-<20% | 1 (3.8) | 1 (4.2) | 0.59 a |
| 20%-<40% | 14 (53.8) | 13 (54.2) | ||
| 40%-<60% | 7 (26.9) | 9 (37.5) | ||
| 60% or more | 4 (15.4) | 1 (4.2) | ||
| % Foreign born ≤ 30 miles of sitee | 0%-<10% | 7 (26.9) | 6 (25.0) | 0.60 a |
| 10%-<20% | 9 (34.6) | 11 (45.8) | ||
| 20%-<30% | 6 (23.1) | 2 (8.3) | ||
| 30% or more | 4 (15.4) | 5 (20.8) | ||
| % Non-English speaking ≤ 30 miles of sitee,f | 0%-<10% | 7 (26.9) | 8 (33.3) | 0.89 a |
| 10%-<20% | 7 (26.9) | 7 (29.2) | ||
| 20%-<30% | 5 (19.2) | 3 (12.5) | ||
| 30% or more | 7 (26.9) | 6 (25.0) | ||
| p-value | ||||
| Site patients seen per | Mean (Standard Deviation) | 41.2 (6.3) | 78.9 (16.0) | 0.10 g |
| week for any trial c | Median | 32.5 | 46 |
a
P-values from logistic regressions are reported because the analysis had to include parent trial as strata in order to interpret the comparison. Each site contributes one data record.
b
Baseline matching criteria used in randomization
c
Information from investigator demographics form
d
Site not in a previous trial or data not available.
e
Information from US Census
f
Speak a language other than English at home
g
A p-value is reported because the p-value had to be adjusted for clustering within site and stratification by parent trial in order to interpret the comparison