Variable | Wave I | Wave II | Wave III |
Outcome variable | |||
Body mass index (kg/m2) | |||
Mean (SD) | 26.1 (6.0) | 26.7 (6.4) | 26.9 (6.5) |
Minimum–maximum | 16.0–50.8 | 15.8–55.4 | 14.2–55.1 |
Missing, n (%) | 10 (1.1 %) | 49 (5.5 %) | 26 (2.9 %) |
Exposure variables | |||
Major chain fast-food outlets within 2 km | |||
Median (Q1–Q3) | 0 (0–2) | 1 (0–3) | |
Minimum–maximum | 0–33 | – | 0–40 |
Major chain fast-food outlets within 3 km | |||
Median (Q1–Q3) | 1 (0–5) | – | 3 (0–6) |
Minimum–maximum | 0–55 | 0–72 | |
Major chain fast-food outlets within 5 km | |||
Median (Q1–Q3) | 3 (0–12) | – | 4 (0–15) |
Minimum–maximum | 0–84 | 0–106 | |
Potential confounders | |||
Age (years) | |||
Mean (SD) | 37.7 (7.1) | 40.6 (7.1) | 42.7 (7.1) |
Minimum–maximum | 18.4–49.5 | 21.3–52.5 | 23.3–54.4 |
Education, n (%) | |||
Low: did not complete high school | 236 (26.8%) | 212 (24.0%) | 186 (21.1%) |
Medium: high school/trade/diploma | 391 (44.3%) | 390 (44.2%) | 394 (44.7%) |
High: tertiary | 253 (28.7%) | 281 (31.8%) | 299 (33.9%) |
Missing | 2 (0.2%) | 0 (0.0%) | 3 (0.3%) |
Employment, n (%) | |||
Full time | 317 (35.9%) | 348 (39.5%) | 356 (40.4%) |
Part-time | 292 (33.1%) | 318 (36.1%) | 344 (39.0%) |
Not in paid employment | 256 (29.0%) | 209 (23.7%) | 170 (19.3%) |
Missing | 17 (1.9%) | 7 (0.8%) | 12 (1.4%) |
Weekly household income, n (%) | |||
<$500 | 73 (8.3%) | 46 (5.2%) | 63 (7.1%) |
$500 to <$1000 | 267 (30.3%) | 218 (24.7%) | 198 (22.5%) |
$1000 to <$1500 | 174 (19.7%) | 188 (21.3%) | 175 (19.8%) |
$1500+ | 175 (19.8%) | 233 (26.4%) | 287 (32.5%) |
Missing | 193 (21.9%) | 197 (22.3%) | 159 (18.0%) |
Children in the household, n (%) | |||
Yes | 596 (67.6%) | 594 (67.4%) | 568 (64.4%) |
No | 282 (32.0%) | 284 (32.2%) | 313 (35.5%) |
Missing | 4 (0.5%) | 4 (0.5%) | 1 (0.1%) |
Urban/rural classification, n (%) | |||
Urban | 401 (45.5%) | 401 (45.5%) | 401 (45.5%) |
Rural | 481 (54.5%) | 481 (54.5%) | 481 (54.5%) |
Q1, quartile 1; Q3, quartile 3.