Table 6.
Prior health knowledge measurements by cluster groups according to usability dimensions for the pulse oximeter using the Kruskal-Wallis test (N=147).
| Measurement | Low group (N=44; overall mean 9.77/40, SD 2.76) | Medium group (N=29; overall mean 14.1/40, SD 0.77) | High group (N=74; overall mean 19.31/40, SD 3.28) | Kruskal-Wallis test | ||||
| Mean (SD) | Range | Mean (SD) | Range | Mean (SD) | Range | χ2 (2,146) | P | |
| Effectiveness (errors) | 1.34 (0.88) | 0-4 | 0.69 (0.6) | 0-7 | 0.92 (1.04) | 0-6 | 10.9 | .004 |
| Efficiency (seconds) | 168.38 (76.98) | 48.2-385.4 | 163.68 (77.47) | 71.4-452.5 | 150.44 (74.49) | 458.8-7 | 2.0 | .37 |
| Satisfaction (SUS score) | 69.86 (16.38) | 32-95 | 71.45 (23.23) | 15-98 | 72.73 (15.16) | 30-100 | 7.5 | .02 |
| Health data read | 0.89 (0.32) | 0-1 | 0.86 (0.35) | 0-1 | 0.91 (0.29) | 0-1 | 0.03 | .98 |