Characteristics of Relative Age Effects and Anthropometric Data in Japanese Recreational and Elite Male Junior Baseball Players

Sports Medicine - Open

Table 3 Distribution of junior players divided into recreational and elite categories

	Q1		Q2		Q3		Q4		Total	X ²	Effect size
	n	(%)	n	(%)	n	(%)	n	(%)	n		w
Recreational elementary school	227	26.9	212	25.1	215	25.5	190	22.5	844	3.38	0.063
[predicted]	211		211		211		211		844
Recreational junior high school	420	29.5	392	27.5	335	23.5	279	19.6	1426	32.44***	0.151
[predicted]	357		357		356		356		1426
Recreational high school	267	32.2	239	28.8	176	21.2	148	17.8	830	42.81***	0.227
[predicted]	208		208		207		207		830
Elite elementary school	71	45.2	47	29.9	29	18.5	10	6.4	157	49.79***	0.563
[predicted]	40		39		39		39		157
Elite junior high school	175	38.9	121	26.9	85	18.9	69	15.3	450	57.60***	0.358
[predicted]	113		113		112		112		450
Elite high school	262	34.6	244	32.2	142	18.8	109	14.4	757	88.84***	0.343
[predicted]	190		189		189		189		757

The number in the second row is the expected number of players obtained using the chi-square test
n number of players, X² chi-squared value
***p < 0.001