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. 2019 May 6;21(5):e11492. doi: 10.2196/11492

Table 2.

Participants’ responses to the question, “How did you find out about this survey?” during the baseline questionnaire.

Characteristics Work Word of mouth Other organizations Outreach activities News Social mediaa Public notice Random sampling Other Don’t know
Participants (N=10,691), n (%) 2300 (21.51)b 1219 (11.40) 1358 (12.70) 2219 (20.76b) 800 (7.48) 1859 (17.39b) 186 (1.74) 360 (3.38) 368 (3.44) 22 (0.21)
Gender, n (%)

Male (N=4922) 901 (18.31) 576 (11.70) 681 (13.84) 976 (19.83b) 416 (8.45) 942 (19.14b) 113 (2.30) 158 (3.21) 151 (3.07) 8 (0.16)

Female (N=5769) 1399 (24.25b) 643 (11.15) 677 (11.73) 1243 (21.55) 384 (6.66) 917 (15.90) 73 (1.27) 202 (3.50) 217 (3.76) 14 (0.24)
City, n (%)

Antwerp (N=1445) 376 (26.02b) 195 (13.49) 289 (20.00) 132 (9.13) 98 (6.78) 311 (21.52) 13 (0.90) N/Ac 28 (1.94) 3 (0.21)

Barcelona (N=1727) 199 (11.52) 369 (21.37) 113 (6.54) 665 (38.51b) 41 (2.37) 220 (12.74) 19 (1.10) N/Ac 95 (5.50) 6 (0.35)

London (N=1446) 317 (21.92b) 146 (10.10) 282 (19.50) 198 (13.69) 110 (7.61) 243 (16.80) 22 (1.52) N/Ac 125 (8.64) 3 (0.21)

Örebro (N=1401) 343 (24.48) 15 (1.07) 36 (2.57) 550 (39.26b) 51 (3.64) 33 (2.36) 9 (0.64) 360 (25.70) 0 (0) 4 (0.29)

Rome (N=1844) 337 (18.28) 244 (13.23) 141 (7.65) 158 (8.57) 253 (13.72) 533 (28.90b) 90 (4.88) N/Ac 88 (4.77) 0 (0)

Vienna (N=1472) 233 (15.83) 155 (10.53) 315 (21.40) 329 (22.35b) 109 (7.40) 275 (18.68) 27 (1.83) N/Ac 25 (1.70) 4 (0.27)

Zurich (N=1356) 495 (36.50b) 95 (7.01) 182 (13.42) 187 (13.79) 138 (10.18) 244 (17.99) 6 (0.44) N/Ac 7 (0.52) 2 (0.15)
Age (years), n (%)

20-29 (N=2339) 378 (16.16) 334 (14.28) 239 (10.22) 618 (26.42b) 138 (5.90) 393 (16.80) 75 (3.21) 58 (2.48) 100 (4.28) 6 (0.26)

30-39 (N=2339) 721 (23.84b) 415 (13.72) 358 (11.84) 528 (17.46) 197 (6.51) 590 (19.51) 37 (1.22) 80 (2.65) 96 (3.17) 2 (0.07)

40-49 (N=2339) 560 (24.39b) 231 (10.06) 298 (12.98) 400 (17.42) 199 (8.67) 435 (18.95) 28 (1.22) 63 (2.74) 79 (3.44) 3 (0.13)

50-59 (N=2339) 474 (24.73b) 151 (7.88) 302 (15.75) 383 (19.98) 145 (7.56) 295 (15.39) 28 (1.46) 63 (3.29) 69 (3.60) 7 (0.37)

>60 (N=2339) 153 (15.09) 75 (7.40) 146 (14.40) 266 (26.23b) 109 (10.75) 132 (13.02) 13 (1.28) 96 (9.47) 20 (1.97) 4 (0.39)
Education level, n (%)

University education (N=2339) 1405 (22.70)b 784 (12.67) 781 (12.62) 1193 (19.28) 449 (7.25) 1086 (17.55) 89 (1.44) 187 (3.02) 208 (3.36) 7 (0.11)

Secondary education (N=2339) 454 (20.48)b 212 (9.56) 288 (12.99) 465 (20.97)b 180 (8.12) 392 (17.68) 53 (2.39) 106 (4.78) 64 (2.89) 3 (0.14)

Primary education (N=2339) 17 (16.50) 6 (5.83) 12 (11.65) 29 (28.16)b 14 (13.59) 13 (12.62) 0 (0) 9 (8.74) 3 (2.91) 0 (0)

No degree (N=2339) 7 (28.00)b 3 (12.00) 2 (8.00) 6 (24.00) 0 (0) 5 (20.00) 0 (0) 0 (0) 2 (8.00) 0 (0)
Employment status, n (%)

Full-time (N=2339) 1633 (27.25b) 644 (10.75) 738 (12.31) 1042 (17.39) 443 (7.39) 1023 (17.07) 61 (1.02) 191 (3.19) 211 (3.52) 7 (0.12)

Part-time (N=2339) 408 (24.55b) 170 (10.23) 252 (15.16) 307 (18.47) 124 (7.46) 301 (18.11) 17 (1.02) 38 (2.29) 43 (2.59) 2 (0.12)

Student (N=2339) 123 (9.04) 201 (14.77) 145 (10.65) 413 (30.35b) 83 (6.10) 248 (18.22) 67 (4.92) 32 (2.35) 48 (3.53) 1 (0.07)

Home duties, retired, or unemployed (N=2339) 17 (1.94) 110 (12.56) 137 (15.64) 266 (30.37b) 84 (9.59) 137 (15.64) 18 (2.05) 79 (9.02) 26 (2.97) 2 (0.23)

aSocial media refers to Facebook and Twitter.

bThese values refer to the highest share of participants reached through different recruitment activities.

cN/A: Not applicable.