Table 1. Relative age distribution by gender and categories of selected and corresponding unselected athletes.

				Observed frequency
				Q1		Q2		Q3		Q4
Category	Gender	CY	N Total	N	%	N	%	N	%	N	%	Expected frequency	χ2	P-value
Selected Youth (U18)	Male	1	61	39	63.9	21	34.4	1	1.6	0	0.0	20.3	35.514	< 0.001
		2	55	10	18.2	14	25.5	20	36.4	11	20.0	13.8	4.418	0.220
	Female	1	41	23	56.1	17	41.5	1	2.4	0	0.0	13.7	18.927	< 0.001
		2	63	14	22.2	13	20.6	18	28.6	18	28.6	15.8	1.317	0.725
Selected Junior (U20)	Male	1	135	57	42.2	47	34.8	22	16.3	9	6.7	33.8	43.459	< 0.001
		2	108	18	16.7	25	23.1	35	32.4	30	27.8	27.0	5.852	0.119
	Female	1	100	40	40.0	32	32.0	15	15.0	13	13.0	25.0	20.720	< 0.001
		2	79	12	15.2	24	30.4	20	25.3	23	29.1	19.8	4.494	0.213
Unselected Youth (U18)	Male	1	2,847	755	26.5	746	26.2	700	24.6	646	22.7	711.8	10.544	0.014
		2	8,371	2,524	30.2	2,313	27.6	1,888	22.6	1,646	19.7	2,092.8	227.449	< 0.001
	Female	1	1,351	350	25.9	376	27.8	321	23.8	304	22.5	337.8	8.979	0.030
		2	7,347	2,115	28.8	1,919	26.1	1,700	23.1	1,613	22.0	1,836.8	83.274	< 0.001
Unselected Junior (U20)	Male	1	1,339	334	24.9	358	26.7	328	24.5	319	23.8	334.8	2.494	0.476
		2	1,945	554	28.5	462	23.8	461	23.7	468	24.1	486.3	12.645	0.005
	Female	1	547	145	26.5	139	25.4	124	22.7	139	25.4	136.8	1.761	0.624
		2	851	235	27.6	205	24.1	208	24.4	203	23.9	212.8	3.162	0.367

CY: Constituent year. N total: Total number of participants by group. Q: Quarter.