Table 3.
Results for heart rate: Pearson correlation coefficient.
| Study | Conditions (sample size) | r a | r ≥.90? | P valueb |
| Bolkhovsky et al | iPhone supine (9) | >.99 | Yes | <.001c |
|
|
iPhone tilt (9) | >.99 | Yes | <.001c |
|
|
Droid supine (13) | .98 | Yes | <.001c |
|
|
Droid tilt (13) | >.99 | Yes | <.001c |
| Drijkoningen et al | Not specified (28) | .98 | Yes | <.001 |
| Gregoski et al | At rest (14) | .99 | Yes | <.001c |
|
|
Reading (14) | .99 | Yes | <.001c |
|
|
Video game (14) | .99 | Yes | <.001 |
| Ho et al | App A finger (40) | .81 | No | <.001 |
|
|
App A earlobe (40) | .91 | Yes | <.001 |
|
|
App B finger (40) | .75 | No | <.001 |
|
|
App B earlobe (40) | .76 | No | <.001 |
|
|
App C finger (40) | .27 | No | .10 |
|
|
App C earlobe (40) | .46 | No | .003 |
|
|
App D finger (40) | .90 | Yes | <.001 |
|
|
App D earlobe (40) | .98 | Yes | <.001 |
| Koenig et al | 80 randomly chosen intervals at rest or after exercise (68) | >.99 | Yes | <.001c |
| Lagido et al | At rest (43) | .94 | Yes | <.001c |
| Losa-Iglesias et al | Sitting up (46) | .95 | Yes | <.001 |
| Matsumura et al | All conditions (12) | .99 | Yes | <.001c |
| Wackel et al | App 1 sinus rhythm (17) | .99 | Yes | <.001c |
|
|
App 1 tachycardia (10 succeeded attempts) | .56 | No | .01c |
|
|
App 2 sinus rhythm (17) | .99 | Yes | <.001c |
|
|
App 2 tachycardia (5 succeeded attempts) | −.43 | No | .09c |
ar value of Pearson correlation coefficient.
bP value calculated with Pearson correlation.
cData based on own calculations.