Table 3 Multivariable logistic regression of patient web portal use

 KP (vs. UI) Site

0.39 (0.31, 0.48)*

< 0.001

   < 65

1.02 (0.83, 1.25)

0.867

  65–74

1 [Reference]

–

   ≥ 75

0.67 (0.49, 0.91)*

0.011

 Female (vs. male) patient

0.80 (0.62, 1.05)

0.105

 Non-White (vs. White) race

0.81 (0.61, 1.08)

0.146

  High school graduate or less

1 [Reference]

–

  Attended college

1.56 (1.18, 2.08)*

0.002

  Completed college

1.55 (1.14, 2.11)*

0.005

  Attended graduate school

1.81 (1.32, 2.47)*

< 0.001

 Higher health literacy

1.5 (1.09, 2.07)*

0.014

 Subjective numeracy

  Higher numeracy

1.19 (0.96, 1.49)

0.114

  Medium numeracy

1 [Reference]

–

  Lower numeracy

0.91 (0.71, 1.16)

0.442

  Level 1 (0–42.5)

1 [Reference]

–

  Level 2 (47.4–52.9)

1.17 (0.79, 1.73)

0.428

  Level 3 (56.4–66.0)

1.36 (0.96, 1.93)

0.085

  Level 4 (68.5–100)

1.45 (1.00, 2.11)

0.053

  Higher level

0.89 (0.72, 1.11)

0.316

  Medium level

1 [Reference]

–

  Lower level

0.79 (0.63, 1)

0.054

  Higher level

1.23 (0.98, 1.53)

0.074

  Medium level

1 [Reference]

–

  Lower level

0.88 (0.70, 1.11)

0.275

  Normal

1 [Reference]

–

  Osteopenia

1.45 (1.16, 1.81)*

0.001

  Osteoporosis

1.12 (0.87, 1.44)

0.388

  Poor

0.72 (0.39, 1.31)

0.278

  Fair

0.94 (0.68, 1.29)

0.703

  Good

1 [Reference]

–

  Very good

0.94 (0.76, 1.18)

0.607

  Excellent

1.08 (0.80, 1.45)

0.633

  None

1 [Reference]

–

  1–2

0.92 (0.76, 1.12)

0.426

   > 2

0.70 (0.45, 1.08)

0.108

 Intervention patient

0.84 (0.70, 1.00)

0.054

 Female Provider

0.92 (0.72, 1.17)

0.486

 Same Gender of Patient and Provider

1.41 (1.10, 1.80)*

0.006