Table 5.
Sociodemographic, geographic, psychographic and behavioral characteristics of clusters, LSAC data
| Characteristics ab | Cluster 1 (n = 143) (‘Social Screens’) | Cluster 2 (n = 900) (‘The Mainstream’) | Sig. |
|---|---|---|---|
| Sociodemographic/physical characteristics | |||
| Sex (male), n (%) [w1] | 66 (46.2%) | 472 (52.4%) | 0.162 |
| Indigenous, n (%) [w1] | 2 (1.4%) | 21 (2.3%) | 0.758c |
| Speaks a language other than English at home, n (%) | 8 (5.6%) | 70 (7.9%) | 0.352 |
| Socioeconomic position z-score, mean (SD) | 0.0 (1.1) | 0.1 (1.0) | 0.485 |
| Attends public school, n (%) | 89 (63.1%) | 431 (48.3%) | 0.001 |
| Number of siblings in household, mean (SD) | 1.6 (1.0) | 1.6 (1.0) | 0.741 |
| Child has two parents living at home, n (%) | 119 (83.8%) | 757 (84.1%) | 0.926 |
| Body mass index of child z-score, mean (SD) | 0.4 (1.0) | 0.3 (1.0) | 0.577 |
| Gross motor coordination scale, mean (SD) | 1.8 (0.4) | 1.8 (0.5) | 0.942 |
| Pubertal development scale, mean (SD) | 2.5 (0.8) | 2.2 (0.8) | 0.000d |
| PEDS physical health scale, mean (SD) | 82.8 (13.7) | 84.6 (14.9) | 0.179 |
| Geographic characteristics | |||
| Child lives in an urban area, n (%) | 130 (90.9%) | 760 (84.4%) | 0.042 |
| Psychographic characteristics | |||
| SDQ internalising symptoms, mean (SD) | 3.3 (2.9) | 3.2 (3.0) | 0.894 |
| SDQ externalising symptoms, mean (SD) | 3.9 (3.2) | 3.9 (3.3) | 0.799 |
| SATI introversion scale, mean (SD) | 2.6 (0.7) | 2.6 (0.8) | 0.783 |
| SATI persistence scale, mean (SD) | 3.6 (0.9) | 3.6 (0.8) | 0.827 |
| SATI reactivity scale, mean (SD) | 2.5 (0.9) | 2.4 (0.8) | 0.298 |
| Child bullied at school in the last year, n (%) | 40 (28.4%) | 229 (26.2%) | 0.588 |
| Behavioral characteristics | |||
| Child participated in any out-of-school activities in the last week, n (%) | 106 (74.6%) | 739 (82.2%) | 0.032 |
| Overall physical activity, mean min/day (SD)e | 67.2 (74.4) | 82.8 (89.5) | 0.047 |
| Season of measurementf | |||
| Wave 4 - winter | 60 (42.0%) | 488 (54.2%) | 0.006 |
| Wave 4 - autumn | 53 (37.1%) | 216 (24.0%) | 0.001 |
n number of participants, % proportion of sample, w wave of measurement, SD standard deviation
Chi-square tests (categorical variables) and independent t-tests (continuous variables), significant results are in boldface
a.Unless otherwise specified, the characteristics listed here were measured at Wave 5 (13y).
b.Variable-specific missing data: Sex (n = 0), Indigenous status (n = 0), language spoken at home (n = 10), socioeconomic position (n = 9), school type (n = 9), number of siblings (n = 1), number of parents in home (n = 1), body mass index (n = 11), gross motor coordination (n = 5), pubertal development (n = 7), PEDS physical health scale (n = 12), urban/rural status (n = 0), SDQ internalising (n = 12), SDQ externalising (n = 12), SATI introversion (n = 12), SATI persistence (n = 12), SATI reactivity (n = 12), child bullied at school (n = 28), child participation in out-of-school activities (n = 2), overall PA (n = 0), season of measurement (n = 0)
c.Fisher’s exact test performed because at least one cell had an expected value of less than 5.
d.When this result was tested separately for boys and girls, the difference between clusters was only significant for girls (F = 13.6, p < 0.001).
e.Overall PA was calculated as the total duration of time spent in non-organized PA, organized PA, active transport or active chores/work.
f.All seasons for both waves were tested, only statistically significant differences reported here.