Table 2.
Comparisons of the completion rates of each subsequent protocol step within sociodemographic groupings of consenting adults—n (row %) or mean ± SD, n, (N = 678 a ).
| Characteristic | n a | Protocol step completed | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Survey | Dietary recalls | Visit 1 | Tracking run-in | Visit 2 | ||||||||||||
| Yes | No | p | Yes | No | p | Yes | No | p | Yes | No | p | Yes | No | p | ||
| Sex at birth | ||||||||||||||||
| Male | 241 | 196 (81%) | 45 (19%) | 0.42 | 146 (74%) | 50 (26%) | 0.61 | 130 (89%) | 16 (11%) | 0.80 | 114 (88%) | 16 (12%) | 0.57 | 109 (96%) | 5 (4%) | 0.29 |
| Female | 437 | 344 (78%) | 93 (22%) | 263 (76%) | 81 (24%) | 232 (88%) | 31 (12%) | 208 (90%) | 24 (10%) | 204 (98%) | 4 (2%) | |||||
| Race/ethnicity | ||||||||||||||||
| White | 311 | 275 (88%) | 36 (12%) | 0.97 | 216 (79%) | 59 (21%) | 0.37 | 188 (87%) | 28 (13%) | 0.89 | 173 (92%) | 15 (8%) | 0.10 | 168 (97%) | 5 (3%) | 0.02 |
| Black or African American | 202 | 179 (89%) | 23 (11%) | 130 (73%) | 49 (27%) | 117 (90%) | 13 (10%) | 97 (83%) | 20 (17%) | 97 (100%) | 0 | |||||
| Hispanic (includes all races) | 43 | 39 (91%) | 4 (9%) | 30 (77%) | 9 (23%) | 27 (90%) | 3 (10%) | 25 (93%) | 2 (7%) | 22 (88%) | 3 (12%) | |||||
| Another race | 48 | 42 (88%) | 6 (12%) | 29 (69%) | 13 (31%) | 26 (90%) | 3 (10%) | 23 (88%) | 3 (12%) | 22 (96%) | 1 (4%) | |||||
| Income | ||||||||||||||||
| Less than $50,000 | 182 | 161 (88%) | 21 (12%) | 0.51 | 125 (78%) | 36 (22%) | 0.75 | 102 (82%) | 23 (18%) | 0.01 | 88 (86%) | 14 (14%) | 0.24 | 86 (98%) | 2 (2%) | 0.90 |
| $50,000–$99,999 | 204 | 178 (87%) | 26 (13%) | 132 (74%) | 46 (26%) | 118 (89%) | 14 (11%) | 104 (88%) | 14 (12%) | 102 (98%) | 2 (2%) | |||||
| $100,000 or greater | 196 | 178 (91%) | 18 (9%) | 136 (76%) | 42 (24%) | 127 (93%) | 9 (7%) | 118 (93%) | 9 (7%) | 114 (97%) | 4 (3%) | |||||
| Education | ||||||||||||||||
| Less than 4 years of college | 190 | 160 (84%) | 30 (16%) | 0.03 | 114 (71%) | 46 (29%) | 0.13 | 91 (80%) | 23 (20%) | 0.0004 | 80 (88%) | 11 (12%) | 0.74 | 74 (93%) | 6 (8%) | 0.009 |
| College, 4 + years (College graduate) | 417 | 377 (90%) | 40 (10%) | 292 (77%) | 85 (23%) | 269 (92%) | 23 (8%) | 240 (89%) | 29 (11%) | 237 (99%) | 3 (1%) | |||||
| Geographic density of census tract | ||||||||||||||||
| Rural | 119 | 96 (81%) | 23 (19%) | 0.41 | 67 (70%) | 29 (30%) | 0.11 | 58 (87%) | 9 (13%) | 0.55 | 52 (90%) | 6 (10%) | 0.85 | 48 (92%) | 4 (8%) | 0.03 |
| Urban | 524 | 439 (84%) | 85 (16%) | 340 (77%) | 99 (23%) | 303 (89%) | 37 (11%) | 269 (90%) | 34 (11%) | 265 (99%) | 4 (1%) | |||||
| Most frequent method of internet access | ||||||||||||||||
| Cell phone | 348 | 301 (86%) | 47 (14%) | 0.39 | 222 (74%) | 79 (26%) | 0.20 | 194 (87%) | 28 (13%) | 0.73 | 170 (88%) | 24 (12%) | 0.54 | 163 (96%) | 7 (4%) | 0.45 |
| Desktop/laptop | 217 | 196 (90%) | 21 (10%) | 150 (77%) | 46 (23%) | 135 (90%) | 15 (10%) | 121 (90%) | 14 (10%) | 119 (98%) | 2 (2%) | |||||
| Tablet | 49 | 43 (88%) | 6 (12%) | 37 (86%) | 6 (14%) | 33 (89%) | 4 (11%) | 31 (94%) | 2 (6%) | 31 (100%) | 0 | |||||
| Use any health apps | ||||||||||||||||
| No | 202 | 121 (60%) | 81 (40%) | <0.0001 | 87 (72%) | 34 (28%) | 0.26 | 73 (84%) | 14 (16%) | 0.13 | 66 (90%) | 7 (10%) | 0.66 | 66 (100%) | 0 | 0.12 |
| Yes | 476 | 419 (88%) | 57 (12%) | 322 (77%) | 97 (23%) | 289 (90%) | 33 (10%) | 256 (89%) | 33 (11%) | 247 (96%) | 9 (4%) | |||||
| Use any wearables | ||||||||||||||||
| No | 236 | 151 (64%) | 85 (36%) | <0.0001 | 110 (73%) | 41 (27%) | 0.33 | 97 (88%) | 13 (12%) | 0.90 | 87 (90%) | 10 (10%) | 0.79 | 85 (98%) | 2 (2%) | 1.00 |
| Yes | 442 | 389 (88%) | 53 (12%) | 299 (77%) | 90 (23%) | 265 (89%) | 34 (11%) | 235 (89%) | 30 (11%) | 228 (97%) | 7 (3%) | |||||
| Recruitment method | ||||||||||||||||
| ResearchMatch | 297 | 207 (81%) | 90 (19%) | 0.41 | 157 (76%) | 50 (24%) | 0.14 | 136 (87%) | 21 (13%) | nc b | 121 (89%) | 15 (11%) | nc b | 118 (98%) | 3 (2%) | nc b |
| Duke patient portal message | 179 | 135 (75%) | 44 (25%) | 92 (68%) | 43 (32%) | 87 (95%) | 5 (5%) | 77 (89%) | 10 (11%) | 75 (97%) | 2 (3%) | |||||
| Online forum | 66 | 58 (88%) | 8 (12%) | 48 (83%) | 10 (17%) | 42 (88%) | 6 (13%) | 39 (93%) | 3 (7%) | 37 (95%) | 2 (5%) | |||||
| Social Media | 42 | 34 (81%) | 8 (19%) | 24 (71%) | 10 (29%) | 22 (92%) | 2 (8%) | 19 (86%) | 3 (14%) | 19 (100%) | 0 | |||||
| Clinical trial website | 62 | 51 (82%) | 11 (18%) | 43 (84%) | 8 (16%) | 35 (81%) | 8 (19%) | 29 (83%) | 6 (17%) | 28 (97%) | 1 (3%) | |||||
| Word of mouth | 56 | 42 (75%) | 14 (25%) | 35 (83%) | 7 (17%) | 30 (86%) | 5 (14%) | 27 (90%) | 3 (10%) | 26 (96%) | 1 (4%) | |||||
| Other | 17 | 13 (76%) | 4 (24%) | 10 (77%) | 3 (23%) | 10 (100%) | 0 | 10 (100%) | 0 | 10 (100%) | 0 | |||||
| Age at enrollment, years | ||||||||||||||||
| Mean ± SD, n | 601 | 53.4 ± 13.3, 539 | 50.1 ± 12.6, 71 | 0.049 | 53.4 ± 13.7, 409 | 53.3 ± 11.8, 130 | 0.95 | 53.8 ± 13.6, 362 | 50.3 ± 14.2, 47 | 0.10 | 54.1 ± 13.5, 322 | 51.6 ± 14.5, 40 | 0.28 | 54.4 ± 13.4, 313 | 49.4 ± 16.7, 9 | 0.30 |
| Comfort using apps, rating 1 = not at all comfortable to 10 = very comfortable | ||||||||||||||||
| Mean ± SD, n | 607 | 9.4 ± 1.2, 536 | 9.3 ± 1.2, 71 | 0.73 | 9.4 ± 1.2, 406 | 9.4 ± 1.2, 130 | 0.87 | 9.4 ± 1.2, 359 | 9.4 ± 1.2, 47 | 0.93 | 9.4 ± 1.2, 319 | 9.7 ± 0.8, 40 | 0.09 | 9.4 ± 1.2, 310 | 9.6 ± 1.0, 9 | 0.45 |
NB: Counts may not sum to 678, due to missing data.
a
Number of consented adults with data. The N for the baseline survey step varies due to the consented adults stopping at variable points in the data collection.
b
The final three steps of recruitment method were not able to be statistically compared due to small cell sizes in the non-completion groups.