Table 1.
Participant sociodemographic characteristics at registration compared to the research cohort
| All children N% | Children who used a voucher N% | Used a voucher / All | Participants who completed one survey N% | Survey one / All | Participants who completed two surveys N% | Survey two / All | |
|---|---|---|---|---|---|---|---|
| N = 671,375 (100%) | N = 550,019 (81.9%) | PRR (95%CI) | N = 37,626 | PRR (95%CI) | N = 12,622 | PRR (95%CI) | |
| Sex* | |||||||
| Male | 361,852 (54.0) | 300,103 (54.6) | 1.01 (1.01–1.02) | 19,607 (52.2) | 0.97 (0.96, 0.98) | 7140(56.6) | 1.05 (1.03, 1.06) |
| Female | 308,543 (46.0) | 249,133 (45.4) | 0.99 (0.98–0.99) | 17,973 (47.8) | 1.04 (1.03, 1.05) | 5472(43.4) | 0.94 (0.93, 0.96) |
| Age | |||||||
| 4–8 years | 269,457 (40.1) | 226,386 (41.2) | 1.03 (1.02–1.03) | 16,388 (43.6) | 1.09 (1.08, 1.09) | 5005(39.7) | 0.99 (0.97, 1.00) |
| 9–11 years | 185,931 (27.7) | 156,364 (28.4) | 1.03 (1.02–1.03) | 9945 (26.4) | 0.95 (0.94, 0.97) | 3476(27.5) | 0.99 (0.98, 1.01) |
| 12–14 years | 138,063 (20.6) | 110,621 (20.1) | 0.98 (0.97–0.98) | 7376(19.6) | 0.95 (0.94, 0.97) | 2742(21.7) | 1.06 (1.04, 1.08) |
| 15–18 years | 77,924 (11.6) | 56,648 (10.3) | 0.89 (0.88–0.89) | 3917(10.4) | 0.90 (0.88, 0.91) | 1399(11.1) | 0.95 (0.93, 0.98) |
| Aboriginal/Torres Strait Islander | |||||||
| No | 626,688 (93.3) | 514,483(93.5) | 1.00 (1.00–1.00) | 35,644(94.7) | 1.01 (1.01, 1.02) | 11,961(94.8) | 1.02 (1.01, 1.03) |
| Yes | 36,129 (5.4) | 28,618 (5.2) | 0.97 (0.96–0.97) | 1533(4.1) | 0.76 (0.73, 0.78) | 512 (4.1) | 0.76 (0.72, 0.80) |
| Prefer not to say | 8558 (1.3) | 6918(1.3) | 0.99 (0.97–1.00) | 449(1.2) | 0.94 (0.88, 0.91) | 149(1.2) | 0.92 (0.84, 1.00) |
| Primary language spoken at home | |||||||
| English | 621,235 (92.5) | 513,793(93.4) | 1.01 (1.01–1.01) | 34,651 (92.1) | 1.00 (0.99, 1.00) | 11,999(95.1) | 1.03 (1.02, 1.04) |
| Language other than English | 50,140 (7.5) | 36,226(6.6) | 0.88(0.87–0.89) | 2975(7.9) | 1.06 (0.98, 1.08) | 623(4.9) | 0.65 (0.61, 0.69) |
| Identified disability | |||||||
| No | 644,658 (96.1) | 530,202(96.5) | 1.00(1.00–1.01) | 36,085(96.0) | 1.00 (0.99, 1.01) | 12,177(96.7) | 1.01 (1.00, 1.02) |
| Yes | 17,715 (2.6) | 12,772 (2.3) | 0.88(0.87–0.89) | 1077(2.9) | 1.08 (0.97, 1.12) | 305(2.4) | 0.92 (0.86, 0.98) |
| Prefer not to say | 8277 (1.2) | 6420(1.2) | 0.95(0.93–0.96) | 426(1.1) | 0.92 (0.95, 0.97) | 113(0.9) | 0.75 (0.66, 0.84) |
| Socio-economic status^ | |||||||
| 1st Quartile (Most Disadvantaged | 99,583 (16.6) | 76,900(15.7) | 0.94 (0.94–0.95) | 4523 (13.2) | 0.81 (0.83, 0.98) | 1257(11.6) | 0.70 (0.67, 0.73) |
| 2nd Quartile | 140,302(23.4) | 116,191(23.7) | 1.01(0.01–0.02) | 7979(23.3) | 1.01 (1.03, 0.99) | 2617(24.2) | 1.03 (1.01, 1.05) |
| 3rd Quartile | 158,783 (26.5) | 130,315(26.5) | 1.00(1.00–1.01) | 9502(27.7) | 1.07 (1.08, 0.99) | 2925(27.0) | 1.02 (1.00, 1.04) |
| 4th Quartile (Least Disadvantaged) | 200,566 (33.5) | 167,753(34.2) | 1.02(1.02–1.02) | 12,289(35.8) | 1.09 (1.10, 0.99) | 4016(37.1) | 1.11 (1.09, 1.13) |
| Geographic location^ | |||||||
| Major city | 440,793 (73.5) | 359,235 (73.1) | 0.99 (0.99–1.00) | 25,593(74.5) | 1.04 (0.99, 1.04) | 7898(72.9) | 0.99 (0.98, 1.00) |
| Inner regional | 126,594 (21.1) | 105,485(21.5) | 1.02(1.01–1.02) | 7062(20.6) | 1.00 (0.99, 1.01) | 2401(22.2) | 1.05 (1.03, 1.07) |
| Outer regional and remote | 32,622 (5.4) | 27,035(5.5) | 1.01(1.00–1.02) | 1681(4.9) | 0.92 (0.97, 0.94) | 530(4.9) | 0.91 (0.87, 0.95) |
| Body Mass Index (BMI) classification, reported at baseline ** | |||||||
| Thin | 35,357 (11.5) | 29,815(11.6) | 1.03 (1.02–1.04) | 2557(12.3) | 1.29 (0.98, 1.31) | 971(11.8) | 1.03 (1.00, 1.06) |
| Healthy weight | 195,166 (63.7) | 165,065(64.1) | 1.03(1.03–1.04) | 13,490(64.8) | 1.23 (0.99, 1.24) | 5427(65.9) | 1.03 (1.01, 1.05) |
| Overweight | 52,675 (17.2) | 43,724(17.0) | 1.01(1.01–1.02) | 3395(16.3) | 1.15 (0.98, 1.17) | 1342(16.3) | 0.95 (0.92, 0.98) |
| Obese | 23,252(7.6) | 18,786(7.3) | 0.99(1.98–1.00) | 1383(6.6) | 1.06 (0.97, 1.09) | 491(6.0) | 0.79 (0.74, 0.84) |
| Physical activity, reported at baseline# | |||||||
| Insufficiently active | 524,334(80.2) | 427,349 (79.6) | 0.99(0.99–1.00) | 29,119(78.7) | 0.99 (0.99, 1.00) | 9505(76.2) | 0.96 (0.95, 0.98) |
| Met physical activity guidelines | 129,228 (19.8) | 109,710(20.4) | 1.04(1.03–1.04) | 7859(21.3) | 1.09 (0.99, 1.10) | 2965(23.8) | 1.20 (1.18, 1.22) |
| Childs annual organised sport and physical activity participation, reported at baseline# | |||||||
| Non-participant | 12,238 (1.9) | 7193 (1.4) | 0.72(0.70–0.73) | 594 (1.6) | 0.87 (0.95, 0.91) | 23(0.2) | 0.11 (−0.09, 0.31) |
| Casual participant (<less than once per week) | 151,675 (24.0) | 114,237(22.1) | 0.92(0.92–0.92) | 7348(20.4) | 0.86(0.99, 0.88) | 1988(16.4) | 0.68 (0.66, 0.70) |
| Regular participant (1–1.9 sessions per week) | 217,878 (34.5) | 182,579(35.2) | 1.02(1.02–1.03) | 12,730(35.3) | 1.04 (0.99, 1.05) | 4237(34.9) | 1.01 (0.99, 1.03) |
| Regular participant (2–3.9 session per week) | 147,616 (23.4) | 126,284(24.4) | 1.04(1.04–1.05) | 9012(25.0) | 1.09 (0.99, 1.10) | 3328(27.4) | 1.17 (1.15, 1.19) |
| Committed participant (> 4 session per week) | 101,290 (16.1) | 87,677(16.9) | 1.06(1.05–1.06) | 6354(17.6) | 1.12 (0.99, 1.13) | 2567(21.1) | 1.31 (1.29, 1.33) |
*Participants did not report sex of the child at birth (n = 980, < 0.2%) ^Some postcodes were missing or invalid (n = 72,141, 11% for socioeconomic status) (n = 71,366, 11% for geographic location); **Reporting height and weight was provided voluntarily (n = 364,925, 54% missing); #Participant reported being ‘unsure’ at registration(n = 17,813, 2.7% for physical activity) (n = 40,678, 6% for annual organised sport and physical activity)