Table 3.
Subjective measures for the EHR and asthma timeline application
| EHR b | Asthma Visualization b | 95% CI of the Differences | P Value c | |
|---|---|---|---|---|
| NASA Task Load Index (raw format) | ||||
| Mental | 50.83 (24.1) | 14.58 (13.4) | [−49.94, −22.56] | <.001 |
| Physical | 9.17 (15.3) | 4.58 (10.5) | [−12.06, 2.89] | .2 |
| Temporal | 55.83 (23.3) | 12.92 (16.6) | [−59.08, −26.75] | <.001 |
| Effort | 55.42 (25.2) | 10.0 (10.4) | [−62.63, −28.20] | <.001 |
| Frustration | 52.5 (28.2) | 5.83 (13.3) | [−66.27, −27.07] | <.001 |
| Performance | 47.08 (18.4) | 17.08 (15.9) | [−44.65, −15.35] | <.001 |
| Overall | 45.14 (15.1) | 10.83 (10.7) | [−44.14, −24.47] | <.001 |
| Usability/utility questionsa | ||||
| This system is easy to use to determine a patient's asthma history. | 2.42 (1.0) | 4.75 (0.5) | [1.65, 3.02] | <.001 |
| This system is efficient in helping me determine a patient's asthma history. | 2.50 (0.9) | 4.83 (0.4) | [1.77, 2.90] | <.001 |
| This system provides useful features to determine a patient's asthma history. | 2.92 (1.1) | 4.92 (0.3) | [1.34, 2.66] | <.001 |
| This system helps me feel confident in determining a patient's asthma history. | 2.83 (0.8) | 4.58 (0.5) | [1.36, 2.14] | <.001 |
| This system provides important patient information in addressing the care of asthmatic patients in the ED. | 3.50 (0.7) | 4.67 (0.5) | [0.71, 1.62] | <.001 |
| Overall, I am satisfied with how this system is designed to address the care of asthmatic patients in the ED. | 2.75 (1.2) | 4.75 (0.5) | [1.28, 2.72] | <.001 |
a
5-point Likert-type scale: 1 = strongly disagree to 5 = strongly agree.
b
All values reported are mean (SD).
c
Paired t-test.