Table 2.
Sample characteristics by study round (1-3).
| Sample description | Values | ||||||||
|
|
Cross-sectional | Longitudinal | |||||||
|
|
April: Round 1 (n=4362) | April: Round 1 (n=2006)a | May: Round 2 (n=1882) | June: Round 3 (n=1369) | |||||
| Age (years), mean (SD) | 42.6 (17.4) | 43.1 (16.6) | 43.0 (16.6) | 44.6 (16.7) | |||||
| Gender, n (%) | |||||||||
|
|
Male | 1698 (39.9) | 635 (31.7) | 589 (31.3) | 433 (31.6) | ||||
|
|
Female | 2615 (60) | 1338 (66.7) | 1263 (67.1) | 911 (66.5) | ||||
|
|
Not specified/other | 49 (1.1) | 33 (1.6) | 30 (1.6) | 25 (1.8) | ||||
| Education, n (%) | |||||||||
|
|
High school or lower | 934 (21.4) | 317 (15.8) | 302 (16.1) | 198 (14.5) | ||||
|
|
Certificate I-IVb | 617 (14.1) | 223 (11.1) | 204 (10.8) | 140 (10.2) | ||||
|
|
University education | 2811 (64.4) | 1466 (73.1) | 1378 (73.1) | 1031 (75.3) | ||||
| Language other than English spoken at home, n (%) | 274 (6.3) | 75 (3.7) | 70 (3.7) | 51 (3.7) | |||||
|
|
Cantonese | 31 (0.7) | 8 (0.4) | 8 (0.4) | 4 (0.3) | ||||
|
|
Mandarin | 28 (0.6) | 12 (0.6) | 11 (0.6) | 2 (0.1) | ||||
|
|
Spanish | 19 (0.4) | 6 (0.3) | 6 (0.3) | 2 (0.1) | ||||
|
|
Vietnamese | 15 (0.3) | 6 (0.3) | 5 (0.3) | 4 (0.3) | ||||
|
|
Hindi | 14 (0.3) | 1 (<0.1) | 1 (0.1) | 1 (0.1) | ||||
|
|
Arabic | 11 (0.3) | 1 (<0.1) | 1 (0.1) | 0 | ||||
|
|
Indonesian | 10 (0.2) | 4 (0.2) | 4 (0.2) | 1 (0.1) | ||||
|
|
Urdu | 10 (0.2) | 2 (0.1) | 2 (0.1) | 2 (0.1) | ||||
|
|
Otherc | 136 (3.1) | 35 (1.7) | 32 (1.7) | 35 (2.6) | ||||
| Socioeconomic status quintiled, mean (SD) | 3.6 (1.4) | 3.7 (1.4) | 3.7 (1.4) | 3.7 (1.4) | |||||
| Residential location, n (%) |
|
|
|
|
|||||
|
|
New South Wales | 2001 (45.9) | 1025 (51.1) | 964 (51.2) | 719 (52.5) | ||||
|
|
Victoria | 788 (18.1) | 323 (16.1) | 303 (16.1) | 201 (14.7) | ||||
|
|
Queensland | 672 (15.4) | 280 (14.0) | 254 (13.5) | 183 (13.4) | ||||
|
|
Western Australia | 371 (8.5) | 138 (6.9) | 133 (7.1) | 91 (6.6) | ||||
|
|
South Australia | 238 (5.5) | 93 (4.6) | 89 (4.7) | 64 (4.7) | ||||
|
|
Tasmania | 144 (3.3) | 79 (3.9) | 74 (3.9) | 58 (4.2) | ||||
|
|
Australian Capital Territory | 120 (2.8) | 62 (3.1) | 59 (3.1) | 49 (3.6) | ||||
|
|
Northern Territory | 28 (0.6) | 6 (0.3) | 6 (0.3) | 4 (0.3) | ||||
aRound 1 longitudinal sample is a subsample of those included in the cross-sectional Round 1 sample, and who responded to at least one follow-up survey. This group was recruited via social media only.
bCertificates I-IV are tertiary qualifications; see Australian Qualifications Framework [25].
cLanguages other than English spoken at home with cell counts <10 at baseline.
dSocioeconomic Indexes for Areas and Index of Relative Socioeconomic Advantage and Disadvantage Quintiles [1-5] based on participants’ residential postcode.