Table 4.
Multivariable models of percentage of tasks completed successfully.
| Variables | Coefficient | 95% CI | Significance (P value) | ||
| Model 1: Design dimensions and diagnostic groups | |||||
|
|
Dimensions | ||||
|
|
|
Navigational depth | −0.318 | −0.348 to −0.289 | <.001 |
|
|
|
Hyperlinks per page | −0.083 | −0.108 to −0.060 | <.001 |
|
|
|
Pop-up menu | 0.056 | 0.032-0.080 | <.001 |
|
|
|
Navigational depth×Navigational lists per page | −0.031 | −0.067 to 0.003 | .08 |
|
|
|
Reading level | −0.050 | −0.073 to −0.026 | <.001 |
|
|
|
Large font | −0.036 | −0.059 to −0.012 | .003 |
|
|
|
Read level×large font | 0.046 | 0.012-0.080 | .008 |
|
|
|
Words per page | −0.020 | −0.044 to 0.004 | .10 |
|
|
|
Navigational depth×words per page | −0.038 | −0.073 to −0.004 | .03 |
|
|
|
Screen length | −0.043 | −0.066 to −0.020 | <.001 |
|
|
|
Hyperlinks per page×screen length | 0.037 | 0.003-0.070 | .03 |
|
|
|
Navigation areas per page | −0.018 | −0.035 to 0.000 | .05 |
|
|
Diagnostic group | ||||
|
|
|
SSDa (vs others) | −0.059 | −0.104 to −0.013 | .01 |
|
|
|
Constant | 0.604 | 0.563-0.644 | <.001 |
| Model 2: Design dimensions, diagnostic groups, and computer understanding | |||||
|
|
Dimensions | ||||
|
|
|
Navigational depth | −0.318 | −0.348 to −0.289 | <.001 |
|
|
|
Hyperlinks per page | −0.084 | −0.108 to −0.060 | <.001 |
|
|
|
Navigational lists per page | 0.056 | 0.031-0.080 | <.001 |
|
|
|
Navigational depth×navigational lists per page | −0.030 | −0.065 to 0.004 | .09 |
|
|
|
Reading level | −0.049 | −0.073 to −0.025 | <.001 |
|
|
|
Large font | −0.036 | −0.059 to −0.013 | .002 |
|
|
|
Read level×large font | 0.048 | 0.0125-0.082 | .005 |
|
|
|
Words per page | −0.021 | −0.045 to 0.003 | .09 |
|
|
|
Navigational depth×words per page | −0.038 | −0.072 to −0.004 | .03 |
|
|
|
Screen length | −0.044 | −0.067 to −0.020 | <.001 |
|
|
|
Hyperlinks per page×screen length | 0.038 | 0.005 to 0.071 | .03 |
|
|
|
Navigation areas per page | −0.017 | −0.035 to 0.000 | .05 |
|
|
Diagnostic group | ||||
|
|
|
SSD (vs others) | −0.039 | −0.110 to 0.032 | .28 |
|
|
Self-reported level of computer understanding | ||||
|
|
|
None/minimal (vs high) | −0.260 | −0.328 to −0.192 | <.001 |
|
|
|
Some (vs high) | −0.066 | −0.112 to −0.019 | .01 |
|
|
|
None/minimal understanding×navigational depth | 0.089 | 0.467 to 0.130 | <.001 |
|
|
|
Some understanding×navigational depth | 0.024 | −0.016 to 0.064 | .24 |
|
|
|
Constant | 0.687 | 0.640 to 0.735 | <.001 |
aSSD: schizophrenia spectrum disorder.