Demographic characteristics of study participants according to the recruitment strategy
| All study participants (n=1357) | By recruitment strategy* | NZ population according to 2013 Census | ||||||
| Internet (n=584) | Radio (n=14) | Word of mouth (n=343) | Email invitation (n=150) | Newspaper/newsletter (n=111) | Other (n=151) | |||
| Age; mean (SD) | 32.7 (9.2) | 31.2 (8.6) | 36.5 (8.5) | 32.3 (9.5) | 34.3 (9.7) | 37.43 (9.72) | 33.83 (8.0) | 38.0 |
| Household size, mean (SD) | 3.6 (1.7) | 3.4 (1.6) | 5.3 (2.3) | 3.6 (1.7) | 3.6 (1.5) | 4.1 (1.5) | 3.8 (2.1) | 2.7 |
| Gender, n (%) | ||||||||
| Male | 152 (11.2) | 54 (9.2) | 1 (7.1) | 48 (14.0) | 26 (17.3) | 11 (9.9) | 10 (6.6) | 48.7% |
| Female | 1205 (88.8) | 530 (90.8) | 13 (92.9) | 295 (86.0) | 124 (82.7) | 100 (90.1) | 141 (93.4) | 51.3% |
| Ethnicity, n (%) | ||||||||
| Māori | 243 (17.9) | 106 (18.2) | 4 (28.6) | 45 (13.1) | 25 (16.7) | 23 (20.7) | 39 (25.8) | 14.9% |
| Pacific | 87 (6.4) | 38 (6.5) | 10 (71.4) | 20 (5.8) | 12 (8.0) | 3 (2.7) | 4 (2.6) | 7.4% |
| Other | 1027 (75.7) | 440 (75.3) | 0 | 278 (81.0) | 113 (75.3) | 85 (76.6) | 108 (71.5) | 74.0% |
| Income, n (%)† | ||||||||
| NZ$20 000 or less | 111 (10.4) | 61 (13.1) | 0 | 31 (11.4) | 8 (6.7) | 1 (1.3) | 9 (7.1) | 11.1% |
| NZ$20 001 –$40 000 | 154 (14.4) | 59 (12.7) | 1 (14.3) | 42 (15.4) | 22 (18.5) | 8 (10.4) | 22 (17.5) | 20.7% |
| NZ$40 001 –$60 000 | 193 (18.1) | 81 (17.5) | 1 (14.3) | 48 (17.6) | 25 (21.0) | 14 (18.2) | 23 (18.3) | 15.5% |
| NZ$60 001 –$70 000 | 114 (10.7) | 56 (12.1) | 0 | 28 (10.3) | 10 (8.4) | 5 (6.5) | 14 (11.1) | 7.0% |
| NZ$70 001 –$1 00 000 | 284 (26.6) | 110 (23.7) | 4 (57.1) | 71 (26.1) | 30 (25.2) | 32 (41.6) | 37 (29.4) | 18.0% |
| NZ$100 001 or more | 213 (19.9) | 97 (20.9) | 1 (14.3) | 52 (19.1) | 24 (20.2) | 17 (22.1) | 21 (16.7) | 27.6% |
| Qualification, n (%) | ||||||||
| None | 28 (2.1) | 10 (1.7) | 2 (14.3) | 8 (2.3) | 3 (2.0) | 2 (1.8) | 3 (2.0) | 18.6% |
| Secondary school qualification | 338 (24.9) | 146 (25.0) | 6 (42.9) | 94 (27.4) | 25 (16.7) | 32 (28.8) | 34 (22.5) | 35.6% |
| University or polytechnic degree/diploma | 893 (65.8) | 395 (67.6) | 3 (21.4) | 213 (62.1) | 108 (72.0) | 67 (60.4) | 104 (68.9) | 26.0% |
| Trade certificate | 48 (3.5) | 16 (2.7) | 3 (21.4) | 15 (4.4) | 6 (4.0) | 5 (4.5) | 3 (2.0) | 8.6% |
| Other | 50 (3.7) | 17 (2.9) | 0 | 13 (3.8) | 8 (5.3) | 5 (4.5) | 7 (4.6) | 11.1% |
| Interest in healthy eating, n (%) | ||||||||
| Not particularly interested | 37 (2.7) | 15 (2.6) | 1 (7.1) | 13 (3.8) | 1 (0.7) | 1 (0.9) | 5 (3.3) | n/a |
| Moderately to very interested | 1320 (97.3) | 569 (97.4) | 13 (92.9) | 330 (96.2) | 149 (99.3) | 110 (99.1) | 146 (96.7) | n/a |
*Recruitment source data were missing for n=3 randomised participants.
†Household income data were missing for n=288 randomised participants.
n/a, not applicable; NZ, New Zealand.