Participant demographics, stratified by the number of devices* owned
| Characteristic | No. of participants (%)† | |||
|---|---|---|---|---|
| No devices n = 17 798 | 1 device n = 71 090 | 2 devices n = 29 938 | 3 devices n = 30 136 | |
| Age, yr, mean ± SD | 49.4 ± 10.3 | 50.4 ± 10.2 | 50.8 ± 9.8 | 50.9 ± 9.3 |
| Male | 7 517 (42.2) | 28 601 (40.2) | 12 738 (42.5) | 13 790 (45.8) |
| Education | ||||
| None, primary or unknown | 11 846 (67.0) | 35 868 (50.6) | 10 822 (36.2) | 5 076 (16.9) |
| Secondary, high, higher secondary school | 4 905 (27.8) | 28 827 (40.7) | 12 371 (41.4) | 10 320 (34.3) |
| Trade, college or university | 924 (5.2) | 6 198 (8.7) | 6 700 (22.4) | 14 723 (48.9) |
| Country income level | ||||
| High | 50 (0.3) | 379 (0.5) | 1 959 (6.5) | 13 615 (45.2) |
| Upper-middle | 2 337 (13.1) | 15 230 (21.4) | 13 444 (44.9) | 11 113 (36.9) |
| Lower-middle | 6 206 (34.9) | 37 007 (52.1) | 11 990 (40.0) | 3 984 (13.2) |
| Low | 9 205 (51.7) | 18 474 (26.0) | 2 545 (8.5) | 1 424 (4.7) |
| Percentage of income spent on food, mean ± SD | 61.6 ± 25.9 | 48.7 ± 23.5 | 40.5 ± 21.2 | 26.3 ± 20.3 |