Characteristics associated with differences in 24-hour device-measured and self-reported sleep, sedentary behaviour and physical activity in a sample of Australian primary school children

Table 3 Multi-level regression model interaction terms and estimates of use-of-time compositions for both measurement types (n = 120)

Factor	Interaction: Type-by-characteristic		Level	Model-based estimates of device-measured use of time				Model-based estimates of self-reported use of time
Factor	χ²	p	Level	Sleep	Sedentary time	LPA	MVPA	Sleep	Sedentary time	LPA	MVPA
Sex	11.9	0.008	Male	616	464	277	83	659	512	176	93
Sex	11.9	0.008	Female	600	509	272	60	646	511	192	91
Age (y)	0.6	0.89	9.5	614	493	268	66	659	519	171	91
			10	604	492	277	67	650	510	188	92
			10.5	595	491	287	68	640	501	206	94
Puberty	11.5	0.08	Pre	606	485	278	71	649	512	186	93
			Early	597	504	272	67	650	523	183	84
			Mid	602	513	275	51	646	489	205	100
Parental Education	23.0	0.001	Low	602	523	268	47	678	533	174	55
			Mid	605	481	291	64	652	510	170	108
			High	601	493	274	72	641	503	206	89
zBMI	0.2	0.97	-1SD	592	504	277	67	643	514	190	93
			mean	604	493	276	67	649	511	188	92
			+ 1SD	615	482	276	67	655	507	187	92
VO ₂ max	10.7	0.01	-1SD	594	523	270	52	651	522	185	83
			mean	603	492	277	69	648	509	188	95
			+ 1SD	608	460	282	90	644	496	192	108
PAT Score (n = 103)	15.9	0.001	-1SD	605	488	278	69	653	515	193	79
			mean	602	502	271	65	647	515	188	90
			+ 1SD	598	517	263	62	641	514	183	103

NB: All models are adjusted for repeated measurements within participants, schools, and data collection waves using random intercepts. Statistically significant (p < 0.05) characteristics are shown in bold
Abbreviations: χ²: chi-squared test; zBMI: body mass index z-score; VO2max: maximal oxygen consumption; PAT: progressive achievement test (academic performance); LPA: light physical activity; MVPA: moderate-to-vigorous physical activity

ISSN: 2731-4391