Table 1. Descriptive statistics in the databases

Weight (kg)	Variable	With phytase					Without phytase
		N	Mean	SD	Min	Max	N	Mean	SD	Min	Max
7–11	Ca/P ratio	80	1.24	0.17	0.92	1.63	135	1.30	0.18	0.94	1.67
	ADG	62	289.41	41.72	195.00	377.01	75	265.41	34.80	191.50	351.01
	ATTD Ca	25	63.20	8.33	42.69	77.58	23	58.11	9.17	33.10	77.30
	ATTD P	25	57.08	9.22	39.85	79.30	23	50.76	10.03	24.20	75.80
	CP	48	79.07	1.58	71.22	80.75	63	74.62	2.83	70.36	79.97
11–25	Ca/P ratio	118	1.29	0.27	0.73	1.90	150	1.25	0.25	0.64	1.90
	ADG	103	418.80	79.42	256.04	577.00	72	411.22	54.31	295.02	543.30
	ATTD Ca	114	72.10	9.94	43.00	90.00	76	56.05	9.32	35.00	72.50
	ATTD P	117	63.76	10.84	30.30	86.00	78	48.34	7.52	30.74	63.19
	CP	109	79.40	1.03	74.10	81.25	99	73.35	2.72	66.55	79.50
25–50	Ca/P ratio	54	1.35	0.19	1.00	1.79	105	1.29	0.20	0.83	1.68
	ADG	53	733.22	74.10	540.30	860.90	53	686.60	98.33	412.01	819.00
	ATTD Ca	49	67.79	11.44	45.60	85.60	56	53.56	9.50	35.40	73.80
	ATTD P	49	61.70	8.39	45.80	78.20	56	46.35	9.81	24.80	72.90
	CP	51	79.46	3.73	70.19	88.60	62	73.19	2.49	69.50	78.75
50–75	Ca/P ratio	52	1.21	0.15	0.92	1.61	63	1.29	0.21	0.94	1.83
	ADG	61	927.21	70.62	746.03	1,070.02	59	900.2	61.41	757.02	1,050.01
	ATTD Ca	52	69.96	6.88	58.52	82.36	42	62.87	7.08	49.00	79.80
	ATTD P	52	57.72	6.04	42.30	68.50	42	49.92	9.02	33.46	71.90
	CP	60	78.57	2.68	71.25	83.21	47	74.65	5.07	61.28	82.47
75–100	Ca/P ratio	68	1.34	0.12	1.14	1.70	67	1.29	0.25	1.00	2.19
	ADG	59	993.51	70.90	859.03	1,170.03	64	920.31	81.52	710.01	1,120.03
	ATTD Ca	56	70.58	3.53	61.28	78.69	60	61.42	3.95	52.96	69.68
	ATTD P	56	60.08	3.65	50.19	66.99	60	52.55	5.50	31.30	61.75
	CP	59	78.85	3.87	70.62	86.28	67	74.18	2.95	65.25	79.33
Overall	Ca/P ratio	372	1.28	0.20	0.73	1.90	520	1.28	0.22	0.64	2.19
	ADG	338	623.72	297.41	195.04	1,170.00	323	605.41	284.03	191.52	1,120.01
	ATTD Ca	296	69.14	9.01	42.69	90.00	257	58.34	8.64	33.10	79.80
	ATTD P	299	60.55	8.71	30.30	86.00	259	49.61	8.64	24.20	75.80
	CP	327	79.09	2.68	70.19	88.60	338	74.00	3.22	61.28	82.47

Ca/P, calcium to phosphorus ratio; ADG, average daily gain; ATTD, apparent total digestibility, Ca, calcium; P, phosphorus; CP, crude protein.