. 2017 Aug 16;12(8):e0182235. doi: 10.1371/journal.pone.0182235

Table 2. Immunoglobulin A and G were measured from plasma at different ages and feeding systems in kids.

Results were expressed as mg/ml and μg/ml for G and A, respectively.

Feeding	Age	IgG	IgA
Natural	1	27.4^a ^A	157.5^A
	3	20.9 ^A	181.3^A
	5	10.8 ^B ^C	122.1^B
	7	14.5^a ^B	82.4^B ^C
	14	4.5 ^C	16.8^C
	21	3.8 ^C	16.7^C
	28	3.5 ^C	3.7^C
Artificial	1	15.8^b	192.2
	3	17.01	187.9
	5	5.9	92.0
	7	8.9^b	104.7
	14	5.9	95.5
	21	3.8	9.7
	28	3.8	6.7
	SED	3.039	28.76
P Value	Feeding	0.002	0.254
	Age	<0.0001	<0.0001
	Feeding x Age	0.034	0.504

SED: standard error of difference.

^a–cWithin a column, means without a common superscript letter differ according to feeding;

^A–CWithin a column, means without a common superscript letter differ according to age, p ≤ 0.05 (LSD test).