Table 2:
Factors associated with older adults’ willingness to complete forms and questionnaires using a health plan patient portal
| Factor | Model 1a | Model 2b | Model 3c |
|---|---|---|---|
| aPR [95% CI] | aPR [95% CI] | aPR [95% CI] | |
| Age group, y | |||
| 65–74 | reference | reference | reference |
| 75–85 | 0.78 [0.73-0.82] | 0.87 [0.83-0.92] | 0.88 [0.83-0.93] |
| Sex | |||
| Male | reference | reference | reference |
| Female | 0.97 [0.92-1.02] | 0.97 [0.92-1.01] | 0.97 [0.92-1.02] |
| Racial/ethnic group | |||
| White | reference | reference | reference |
| Black | 0.87 [0.78-0.98] | 0.97 [0.87-1.08] | 1.00 [0.90-1.11] |
| Latino | 0.84 [0.74-0.95] | 0.89 [0.79-0.99] | 0.90 [0.80-1.00] |
| Asian or Pacific Islander | 0.89 [0.83-0.96] | 0.96 [0.90-1.03] | 0.98 [0.92-1.05] |
| Other | 0.77 [0.55-1.09] | 0.90 [0.68-1.20] | 0.92 [0.69-1.22] |
| Education | |||
| ≥ Bachelor’s degree | reference | reference | reference |
| Some college/associate degree | 0.84 [0.79-0.89] | 0.91 [0.86-0.96] | 0.91 [0.87-0.96] |
| ≤ High school graduate | 0.61 [0.55-0.67] | 0.78 [0.71-0.85] | 0.79 [0.72-0.86] |
| Ability to use the internet | |||
| Uses by self | — | reference | reference |
| Uses with help or a proxy uses it | — | 0.41 [0.34-0.50] | 0.43 [0.35-0.52] |
| Does not use | — | 0.11 [0.07-0.18] | 0.13 [0.08-0.19] |
| Sent ≥ 1 message through patient portal in prior 18 mo | |||
| No | — | — | reference |
| Yes | — | — | 1.20 [1.13-1.28] |
| Model fitd | AUC = 0.64 | AUC = 0.70 | AUC = 0.72 |
Model includes age group, sex, racial/ethnic group, and education.
Model includes age group, sex, racial/ethnic group, education, and ability to use the internet.
Model includes age group, sex, racial/ethnic group, education, ability to use the internet, and history of sending a message through the patient portal in the prior 18 mo.
Model fit is AUC-statistic calculated using logistic regression with the predicted values from the log-Poisson model as the independent variable as described in the statistical analysis subsection of the text.
aPR: Adjusted prevalence ratio;AUC, Area under the receiver operating characteristic curve; CI: Confidence interval; variable = Willing to complete patientDependent variable, Willing to complete patient portal forms/questionnaires vs not willing/not sure.