Table 1.
APROPOS Participant Baseline Characteristics by Treatment Group and Subgroup of Treatment Groups with Appreciable Intervention Online Exposure†
| Characteristic | Control N = 1342 |
Intervention N = 1342 |
Appreciable Exposure N = 257 |
|---|---|---|---|
| Age, years, mean (SD)*** | 74.9 (7.9) | 74.9 (8) | 73.2 (6.9) |
| Race/Ethnicity* | |||
| Non-Hispanic Caucasian | 1239 (92.3%) | 1247 (92.9%) | 246 (95.7%) |
| Black | 52 (3.9%) | 46 (3.4%) | 1 (0.4%) |
| Hispanic | 21 (1.6%) | 25 (1.9%) | 3 (1.2%) |
| Asian | 13 (1.0%) | 13 (1.0%) | 4 (1.6%) |
| Other/Not specified | 10 (0.8%) | 3 (0.2%) | 3 (1.2%) |
| Education*** | |||
| Some high school or less | 53 (4.0%) | 40 (3.0%) | 2 (0.8%) |
| High school graduate | 271 (20.3%) | 255 (19.2%) | 23 (9.1%) |
| Some college or more | 1007 (75.7%) | 1030 (77.8%) | 228 (90.1%) |
| Fracture history | |||
| Wrist | 384 (28.6%) | 382 (28.4%) | 78 (30.4%) |
| Vertebral | 106 (7.9%) | 105 (7.8%) | 15 (5.8%) |
| Hip | 84 (6.3%) | 79 (5.9%) | 15 (5.8%) |
| Fracture history within the previous 12 months | |||
| Yes | 123 (9.4%) | 96 (7.3%) | 24 (9.5%) |
| General health | |||
| Excellent, very good, or good* | 1107 (84.2%) | 1113 (85.0%) | 229 (89.8%) |
| Comorbidities | |||
| Depression | 276 (21.3%) | 272 (21.2%) | 52 (21.2%) |
| Dementia | 20 (1.6%) | 14 (1.1%) | 3 (1.2%) |
| Risk of fracture | |||
| Lower than average | 504 (38.3%) | 542 (41.8%) | 115 (46.0%) |
| Average | 524 (39.8%) | 501 (38.6%) | 83 (33.2%) |
| Higher than average | 288 (21.9%) | 255 (19.7%) | 52 (20.8%) |
| Osteoporosis prescription treatment | |||
| Prior treatment (including estrogen)** | 815 (64.0%) | 826 (64.8%) | 182 (72.8%) |
| Other medications, current | |||
| Vitamin D | 1062 (82.8%) | 1080 (84.1%) | 216 (86.1%) |
| Calcium supplement | 867 (68.7%) | 863 (68.6%) | 178 (71.2%) |
| Phone and email provided | |||
| Phone** | 892 (66.5%) | 899 (67.0%) | 194 (75.5%) |
| Email*** | 657 (49.0%) | 641 (57.5%) | 207 (80.5%) |
| Readiness for osteoporosis behavior change | |||
| Pre-contemplative | 806 (72.0%) | 822 (72.2%) | 169 (72.8%) |
| Contemplative | 270 (24.1%) | 274 (24.1%) | 53 (22.8%) |
| Health literacy | |||
| Adequate*** | 1119 (86.1%) | 1144 (87.5%) | 238 (93.7%) |
| Bone mineral density testing* | |||
| No | 204 (15.6%) | 186 (14.3%) | 24 (9.6%) |
| Yes in the last 12 months | 284 (21.8%) | 277 (21.3%) | 60 (24.0%) |
| Yes, more than 12 months ago | 818 (62.6%) | 835 (64.3%) | 166 (66.4%) |
†
Appreciable exposure to the intervention online (defined as at least 20 seconds of viewing time); All comparisons examine appreciable exposure versus control:
*
p<0.05,
**
p<0.01,
***
p<0.0001.