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. 2020 Oct 22;8(10):e18312. doi: 10.2196/18312

Table 1.

Demographics of the participants and the devices they used.

Younger (Y) participant group Older (O) participant group
ID Gendera Age (years) Type of device Duration of use ID Gender Age (years) Type of device Duration of use
Y1 M 20 Fossil smartwatch 1 year O1 F 89 Fitbit 3 years
Y2 F 19 Fitbit 2 years O2 F 69 Fitbit 4 years
Y3 M 21 Frontier smartwatch 2 years O3 F 69 iPhone Health app 4 years
Y4 M 19 Fitbit 2 years O4 F 72 Fitbit 5 years
Y5 F 21 Fitbit 7 months O5 F 69 Fitbit 6 months
Y6 M 22 Fitbit 1 year O6 M 66 Fitbit 2 years
Y7 M 19 Apple watch 3 years O7 M 78 Fitbit, iPhone Health app 3 years
Y8 M 24 Garmin smartwatch 2 months O8 F 80 Fitbit 1 year
Y9 F 20 Fitbit 18 months O9 F 71 iPhone Health app 3 years
Y10 F 21 Fitbit 2 years O10 F 70 Fitbit, H-Band 5 years
Y11 M 18 Fitbit 3 months O11 F 72 Fitbit 6 years
Y12 M 20 Fitbit, MyKronoz 1 year O12 M 67 iPhone Health app 5 years
Y13 M 20 Fitbit, iPhone Health app 2 years O13 M 69 iPhone Health app 2 months
Y14 M 19 Apple watch 18 months O14 F 65 Fitbit 1 year
Y15 F 19 iPhone Health app, Apple watch, Lose it app 6 years O15 F 67 Fitbit, Weight Watchers app, My Fitness Pal app 3 years

aGender: male (M), female (F).