Table 1.
Characteristics of the Randomized Practices and the Practice-Level Baseline Characteristics of the Participants Enrolled in the Intervention and Control Practices*
| Intervention practices (N = 43) | Control practices (N = 43) | |
|---|---|---|
| RANDOMIZED PRACTICES | ||
| Urban, n | 39 | 39 |
| Majority white, n | 35 | 35 |
| Majority English-speaking†, n | 40 | 40 |
| Practice size‡ | ||
| First tertile (400–690)‡, n | 14 | 14 |
| Second tertile (694–965)‡, n | 14 | 15 |
| Third tertile (985–5946)‡, n | 15 | 14 |
| Median (IQR) | 772 (524) | 802 (611) |
| PARTICIPANTS AT BASELINE ¶ | ||
| Age (years), mean | 79.7 ± 1.4 | 79.3 ± 1.2 |
| Female sex (mean %) | 64.2 ± 9.3 | 63.0 ± 10.9 |
| Race, (mean %) | ||
| White | 89.1 ± 14.4 | 89.2 ± 11.2 |
| Black | 6.1 ± 12.1 | 6.6 ± 9.5 |
| Other | 4.3 ± 6.0 | 3.4 ± 5.0 |
| Unknown | 0.4 ± 0.7 | 0.8 ± 1.1 |
| Latino/Hispanic ethnicity (mean %) | 9.7 ± 17.7 | 9.6 ± 17.9 |
| Education (mean %) | ||
| High school graduate or less | 25.5 ± 14.2 | 26.3 ± 16.0 |
| Some college or equivalent | 26.2 ± 9.8 | 25.5 ± 9.2 |
| College graduate | 18.7 ± 7.6 | 18.6 ± 6.1 |
| Post-graduate | 29.6 ± 14.7 | 29.5 ± 18.0 |
| Unknown | 0.0 ± 0.2 | 0.1 ± 0.4 |
| Chronic conditions§, mean | 2.1 ± 0.2 | 2.2 ± 0.2 |
| Cognitively impairedII (mean %) | 2.8 ± 2.4 | 2.8 ± 2.4 |
| Use of mobility aid or nonambulatory (mean %) | 34.6 ± 9.2 | 34.9 ± 9.1 |
| Screening questions for fall injuries (mean %) | ||
| Fell 2 or more times in past year | 36.3 ± 8.7 | 34.8 ± 9.0 |
| Fell and hurt self in past year | 38.4 ± 5.2 | 39.4 ± 6.2 |
| Afraid of falling because of walking or balance problems | 86.1 ± 5.4 | 86.6 ± 6.9 |
Legend:
* Because the unit of randomization was the practice rather than the participant, this table is included as a check on the adequacy of the randomization
† Not explicitly constrained, balance forced by constraining on rural/urban and majority white
‡ The practice size refers to the number of age-eligible patients in the practice. The range of the number of age-eligible patients in each tertile is shown in the parentheses
¶ Data for baseline characteristics are mean ± SD
§ Chronic conditions included hypertension, fracture other than hip since age 50, cancer, arthritis, diabetes, chronic lung disease, myocardial infarction, stroke, congestive heart failure, hip fracture, and Parkinson’s disease
II Four or more errors on 6-item Callahan cognitive screener or interview completed entirely by proxy