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. 2020 Feb 24;8(2):e16316. doi: 10.2196/16316

Table 2.

Demographics of the respondents with a valid eHEALS sum score (n=323) and the test-retest group (n=35).

Characteristics All Test-retest group
Biological sex, n (%)a


Man 160 (50) 21 (60)

Woman 160 (50) 14 (40)
Age in years


Mean (SD) 49.2 (21.5) 44.4 (12.2)

Range 19-94 26-89
Highest education level, n (%)


1-6 years 4 (1) 1 (3)

7-9 years 24 (8) 2 (6)

10-12 years 149 (47) 4 (11)

Graduated from university 143 (45) 28 (80)
General self-perceived health, n (%)


Very poor 0 (0) 0 (0)

Poor 8 (3) 1 (3)

Fair 38 (12) 1 (1)

Good 197 (61) 25 (71)

Very good 80 (25) 8 (23)
HLS-EU-Q16b, n (%)


Inadequate 20 (6) 2 (6)

Problematic 72 (22) 4 (12)

Sufficient 231 (72) 27 (82)
Sw-eHEALSc


Mean (SD) 29.3 (6.2) 31.2 (33.0)

Range 8-40 12-40
Frequency of internet use, n (%)


Almost never 8 (3) 1 (3)

Less than 1 day a week 1 (0) 0 (0)

Around 1 day a week 8 (3) 1 (3)

Several days a week 22 (7) 2 (6)

Almost every day 284 (88) 31 (89)
Usability of the internet, n (%)


Not useful at all 12 (4) 1 (3)

Not useful 12 (4) 2 (6)

Unsure 52 (16) 1 (3)

Useful 171 (54) 17 (49)

More useful 72 (23) 14 (40)
Importance of the internet, n (%)


Not important at all 11 (3) 1 (3)

Not important 16 (5) 3 (9)

Unsure 43 (13) 2 (6)

Important 137 (43) 15 (43)

Very important 113 (35) 14 (40)

aMissing n=3.

bHLS-EU-Q16: Health Literacy Survey European Questionnaire, 16-item.

cSw-eHEALS: eHealth Literacy Scale.