Table 3.
Frequencies and McNemar chi-square differences for perceived affordances (n=462).
| Affordances | High prototypicality, n (%) | Low prototypicality, n (%) | Chi-square (df) | P value |
| Track my progress | 430 (93.1) | 325 (70.3) | 79.70 (1) | <.001 |
| Set health goals | 405 (87.7) | 339 (73.4) | 30.75 (1) | <.001 |
| Improve my health | 342 (74.0) | 293 (63.4) | 20.15 (1) | <.001 |
| Learn health tips | 336 (72.7) | 353 (76.4) | 2.59 (1) | .11 |
| Give me more information about my health | 325 (70.3) | 292 (63.2) | 6.86 (1) | .009 |
| Create new health habits | 310 (67.1) | 265 (57.4) | 11.06 (1) | .001 |
| Increase my control over my health | 323 (69.9) | 239 (51.7) | 46.86 (1) | <.001 |
| Make meeting my health goals easier | 292 (63.2) | 195 (42.2) | 51.28 (1) | <.001 |
| Have fun with technology | 256 (55.4) | 135 (29.2) | 79.57 (1) | <.001 |
| Interact with others | 120 (26.0) | 47 (10.2) | 56.63 (1) | <.001 |
| Share my health data with friends | 100 (21.6) | 47 (10.2) | 35.12 (1) | <.001 |
| Share my health data with a healthcare provider | 74 (16.0) | 50 (10.8) | 11.50 (1) | .001 |
| Earn rewards | 57 (12.3) | 34 (7.4) | 10.30 (1) | .001 |