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. 2020 May 1;22(5):e12611. doi: 10.2196/12611

Table 4.

Prevalence of email communication with clinicians by individuals’ characteristics based on authors’ analysis of National Center for Health Statistics, National Health Interview Surveys, 2013 and 2018. Percentages are weighted national estimates.

Characteristics Individuals emailing clinicians in 2013, % (95% CI) Individuals emailing clinicians in 2018, % (95% CI) P value
Age (years) <.001

18-44 6.82 (6.25-7.39) 15.98 (14.87-17.10)

45-64 8.81 (8.12-9.50) 19.15 (17.97-20.33)

65+ 5.23 (4.47-6.00) 14.21 (13.09-15.32)
Sex <.001

Male 6.02 (5.47-6.57) 14.25 (13.29-15.22)

Female 8.33 (7.77-8.89) 18.93 (17.83-20.02)
Education <.001

Less than a high school diploma 1.00 (0.65-1.36) 2.55 (1.84-3.26)

High school diploma or equivalent 3.26 (2.74-3.79) 8.66 (7.74-9.58)

Some college, no degree 6.54 (5.69-7.39) 15.21 (13.74-16.68)

Associate’s degree 6.97 (5.92-8.01) 17.41 (15.72-19.09)

Bachelor’s degree 12.87 (11.87-13.86) 25.18 (23.51-26.86)

Graduate or professional degree 17.06 (15.49-18.64) 33.23 (31.03-35.43)
Hispanic <.001

Yes 3.36 (2.78-3.93) 9.41 (8.00-10.83)

No 7.91 (7.50-8.31) 18.09 (17.23-18.95)
Race <.001

Black 4.68 (3.85-5.50) 11.07 (9.74-12.40)

Other race 9.07 (7.71-10.43) 16.86 (14.17-19.56)

White 7.45 (7.04-7.86) 17.56 (16.64-18.48)
Speak English

Not at all 0.30 (0.00-0.77) 0.48 (0.00-1.15) .67

Not well 1.13 (0.58-1.68) 0.75 (0.16-1.34) .35

Well 3.51 (2.49-4.54) 9.48 (7.40-11.55) <.001

Very well 8.39 (7.75-9.03) 18.16 (17.29-19.04) <.001
Region <.001

Northeast 6.35 (5.57-7.14) 15.59 (13.77-17.42)

Midwest 6.05 (5.25-6.84) 16.28 (14.78-17.78)

South 5.88 (5.37-6.40) 14.54 (13.28-15.80)

West 11.17 (10.29-12.06) 21.10 (18.78-23.42)
Health insurance <.001

Uninsured 1.91 (1.48-2.34) 4.71 (3.70-5.73)

Medicaid or other public payer 3.76 (2.90-4.62) 7.70 (6.48-8.92)

Medicare 4.05 (3.32-4.78) 13.63 (12.14-15.12)

Military 9.06 (6.92-11.19) 23.03 (18.35-27.72)

Private 9.61 (9.08-10.13) 20.54 (19.50-21.57)
Saw/spoke to clinician in prior 12 months <.001

Physician 8.81 (8.36-9.27) 20.01 (19.03-20.99)

Nonphysician clinician 4.85 (3.65-6.04) 9.23 (7.53-10.93)

None 1.54 (1.1-1.98) 3.34 (2.54-4.14)
Internet use <.001

Yes 9.38 (8.93-9.84) 20.09 (19.13-21.04)

No 0.44 (0.23-0.65) 1.28 (0.85-1.71)