Table 1.

Plasma concentrations (nmol/L) of 25(OH)D by supplement dose.

Age (mo)		Vitamin D supplement dose (IU/day)
		200	400	600	800
1	Number of observations	56	60	56	41
	Mean ± SD	35.1 ± 18.7	42.2 ± 18.6	43.4 ± 21.0	44.2 ± 19.8
	Range	9.8 – 93.5	13.5 – 99.0	12.5 – 97.2	8.2 – 103.0
	Number (%) <50 nmol/L	46 (82)	45 (75)	36 (64)	26 (63)
	Number (%) <30	25 (45)	19 (32)	18 (32)	10 (24)
2	Number of observ.	53	55	49	37
	Mean ± SD	64.3 ± 21.0	72.2 ± 19.5	77.3 ± 21.6	82.7 ± 30.7
	Range	13.4 – 140.5	22.2 – 119.2	22.8 – 141.2	34.5 – 195.2
	Number (%) <50	13 (24)	4 (7)	4 (8)	3 (8)
	Number (%) <30	3 (6)	2 (4)	1 (2)	0
4	Number of observ.	46	44	42	33
	Mean ± SD	76.1 ± 28.2	81.3 ± 29.2	101.6 ± 32.4	100.9 ± 27.2
	Range	16.2 – 150.8	16.8 – 136.0	45.0 – 209.8	44.8 – 175.5
	Number (%) <50	5 (11)	8 (18)	1 (2)	2 (6)
	Number (%) <30	2 (4)	3 (7)	0	0
5.5	Number of observ.	45	37	40	30
	Mean ± SD	75.1 ± 30.1	84.5 ± 29.9	97.6 ± 27.3	103.0 ± 23.6
	Range	7.8 – 153.2	11.8 – 141.0	23.2 – 154.8	50.0 – 163.8
	Number (%) <50	5 (11)	5 (14)	2 (5)	0
	Number (%) <30	5 (11)	2 (5)	1 (2)	0
7.5	Number of observ.	42	34	32	28
	Mean ± SD	85.7 ± 23.9	94.3 ± 29.9	101.6 ± 33.0	115.8 ± 24.8
	Range	29.5 – 142.8	7.0–167.8	42.5–180.0	68.5–182.2
	Number (%) <50	2 (5)	1 (3)	2 (6)	0
	Number (%) <30	1 (2)	1 (3)	0	0
9	Number of observ.	39	31	30	25
	Mean ± SD	92.8 ± 20.7	95.2 ± 23.0	103.2 ± 23.4	118.1 ± 27.2
	Range	36.0 – 153.5	47.5–134.0	38.5–153.2	74.5–180.2
	Number (%) <50	1 (3)	1 (3)	1 (3)	0
	Number (%) <30	0	0	0	0
12	Number of observ.	38	30	27	24
	Mean ± SD	87.9 ± 24.7	85.1 ± 17.6	81.0 ± 18.4	90.4 ± 16.8
	Range	49.0 – 134.5	45.0–118.5	38.2–116.0	57.0–122.5
	Number (%) <50	1 (3)	1 (3)	1 (4)	0
	Number (%) <30	0	0	0	0