Table 1.
Characteristics of the PLAYCE cohort sample data
| All children | Analysis sample | |
|---|---|---|
| n = 1918 | n = 1167 | |
| Wave 1 age (median years (IQR)) | 3.3 (1.2) | 3.3 (1.1) |
| n (%) | n (%) | |
| Child sex | ||
| Male | 1011 (52.7) | 601 (51.5) |
| Female | 906 (47.3) | 566 (48.5) |
| Mother’s work status | ||
| Not in paid employment | 311 (19.0) | 221 (18.9) |
| Working full-time or part-time | 1330 (81.0) | 946 (81.1) |
| Dwelling type | ||
| Standalone house | 1333 (84.4) | 997 (85.4) |
| Duplex/townhouse/flat/other | 247 (15.6) | 170 (14.6) |
| Yard size | ||
| No or small yard | 311 (19.8) | 239 (20.5) |
| Medium or large yard | 1260 (80.2) | 928 (79.5) |
| Wave 1 valid accelerometer data1 | ||
| No | 751 (39.2) | 97 (8.3) |
| Yes | 1167 (60.8) | 1070 (91.7) |
| Wave 1 season | ||
| Summer | 127 (10.9) | 113 (10.6) |
| Autumn | 318 (27.2) | 288 (26.9) |
| Winter | 307 (26.3) | 275 (25.7) |
| Spring | 415 (35.6) | 394 (36.8) |
| Wave 2 valid accelerometer data | ||
| No | 1474 (76.9) | 742 (63.8) |
| Yes | 444 (23.1) | 425 (36.4) |
| Wave 2 season1 | ||
| Summer | 71 (16.0) | 68 (16.0) |
| Autumn | 199 (44.8) | 191 (44.9) |
| Winter | 108 (24.3) | 105 (24.7) |
| Spring | 66 (18.9) | 61 (14.4) |
| Wave 2 data collection during COVID-192 | ||
| No | 237 (53.4) | 229 (53.9) |
| Yes | 207 (46.6) | 196 (46.1) |
|
Wave 1 accelerometer wear time (mean mins/day (SD)) |
665.0 (64.3) | 665.4 (63.9) |
|
Wave 2 accelerometer wear time (mean mins/day (SD)) |
884.8 (154.4) | 886.6 (154.8) |
Table notes. Categories may not sum to denominator due to missing data. The analysis sample was restricted to children who had valid age and sex data, at least one wave of valid accelerometer data, and all covariates
1 Based on end date of accelerometer wear. Denominator is children with valid accelerometer data at relevant wave
2 Based on end date of accelerometer wear being on or after the date Western Australia entered a State of Emergency (15/03/2020). Denominator is children with valid accelerometer data at wave 2