Influence of the relative age effect on children’s scores obtained from the Canadian assessment of physical literacy

Dutil, Caroline; Tremblay, Mark S.; Longmuir, Patricia E.; Barnes, Joel D.; Belanger, Kevin; Chaput, Jean-Philippe

doi:10.1186/s12889-018-5895-6

Table 3 Relative age differences in scores obtained in the Canadian Assessment of Physical Literacy based on children’s month of birth

From: Influence of the relative age effect on children’s scores obtained from the Canadian assessment of physical literacy

	Quarter 1 January to March			Quarter 2 April to June			Quarter 3 July to September			Quarter 4 October to December			F-test
	Mean	95% CI		Mean	95% CI		Mean	95% CI		Mean	95% CI
	Mean	LB	UB	Mean	LB	UB	Mean	LB	UB	Mean	LB	UB		p	ƒ²
Boys
Height (cm)^a (n = 4081)	146.2	145.7	146.6	144.6‡	144.1	144.9	142.9‡†	142.5	143.3	142.3‡†	141.9	142.8	563.86^*	< 0.001	0.04
Weight (kg)^a (n = 4076)	42.0	41.3	42.6	39.9‡	39.3	40.5	38.9‡	38.3	39.5	38.6‡†	37.9	39.3	175.57^*	< 0.001	0.02
BMI (kg/m²)^a (n = 4059)	19.4	19.1	19.6	18.9‡	18.6	19.1	18.8‡	18.6	19.0	18.8‡	18.5	19.0	35.09^*	0.001	0.004
WC (cm)^a (n = 4039)	68.9	68.2	69.5	67.4‡	66.8	68.0	67.0‡	66.4	67.6	66.5‡	65.8	67.2	72.28^*	< 0.001	0.01
Physical Competence domain score^b (n = 4059)	20.6	20.3	20.8	20.1‡	19.9	20.3	19.8‡	19.6	20.0	19.6‡†	19.3	19.8	277.04^*	< 0.001	0.01
Daily Behaviour domain score^b (n = 4059)	18.6	18.1	19.1	18.5	18.0	18.9	18.6	18.1	19.0	19.1	18.6	19.0	12.54^*	0.26	0.001
Motivation and Confidence domain score^b (n = 4059)	12.9	12.7	13.1	12.8	12.6	12.9	12.6	12.5	12.8	12.8	12.6	12.9	5.48^*	0.42	0.001
Knowledge and Understanding domain score^a (n = 4100)	12.2	12.0	12.4	12.0	11.9	12.2	11.7‡†	11.5	11.8	11.6‡†	11.5	11.8	78.49^*	< 0.001	0.01
Total CAPL score^b (n = 4059)	64.2	63.4	64.9	63.3	62.6	64.1	62.7‡	61.9	63.4	63.1	62.3	63.9	60.4^*	0.04	0.002
Girls
Height (cm)^a (n = 4114)	146.5	146.1	147.0	144.6‡	144.2	145.1	143.7‡†	143.3	144.1	142.2‡†	141.8	142.7	629.71^*	< 0.001	0.04
Weight (kg)^a (n = 4110)	41.5	40.9	42.2	40.4	39.8	41.0	39.5‡	39.0	40.1	38.9‡†	38.2	39.6	201.36^*	< 0.001	0.01
BMI (kg/m²)^a (n = 4092)	19.1	18.9	19.3	19.0	18.8	19.3	18.9	18.6	19.1	19.0	18.7	19.2	32.93^*	0.45	0.001
WC (cm)^a (n = 4076)	67.8	67.2	68.4	67.4	66.7	68.0	66.6‡	66.0	67.1	66.8	66.1	67.6	61.71^*	0.03	0.002
Physical Competence domain score^b (n = 4092)	19.9	19.7	20.2	19.5‡	19.3	19.7	19.2‡	19.0	19.3	18.9‡†	18.7	19.2	276.74^*	< 0.001	0.01
Daily Behaviour domain score^b (n = 4092)	18.5	18.0	18.9	18.2	17.8	18.7	18.0	17.6	18.4	18.5	18.1	19.0	16.08^*	0.34	0.001
Motivation and Confidence domain score^b (n = 4092)	12.5	12.3	12.6	12.3	12.1	12.4	12.2‡	12.0	12.3	12.2‡	12.0	12.3	8.72^*	0.036	0.002
Knowledge and Understanding domain score^a (n = 4133)	12.4	12.2	12.6	12.2	12.0	12.3	12.2	12.1	12.4	11.9‡	11.8	12.1	72.83^*	0.001	0.004
Total CAPL score^b (n = 4092)	63.3	62.6	63.9	62.1	61.5	62.1	61.5‡	60.9	62.1	61.6‡	60.9	62.3	49.56^*	0.001	0.004

An analysis of covariance was conducted controlling for multiple covariates described in each model. The F-test is shown for the overall corrected model (*p < 0.001). The last two columns, the p-value and Cohen’s ƒ² effect sizes, are presented for the main effect of the relative age by quarters
^‡statistically significant differences between quarter 1 and other quarters
^†statistically significant differences between quarter 2 and other quarters
^acontrolled for site location, age (whole years) and testing month
^bcontrolled for BMI z-score, site location, age (whole years) and testing month
CI confidence interval, LB lower bound, UB upper bound, BMI body mass index, WC waist circumference, CAPL Canadian Assessment of Physical Literacy

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ISSN: 1471-2458

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