Evaluation of Plasma Amino Acid Levels in Preterm Infants and Their Potential Correlation with Retinopathy of Prematurity

Table 2

The analysis of serum amino acid levels and values in both groups.

Amino acids (μmol/L)	Group A (n = 26)	Group B (n = 29)	Reference values	value
Taurine (Tau)	59.8 ± 23	71 ± 48	>26 – < 130	0.274
Tryptophan (Try)	53.2 ± 16	55.4 ± 22	>16 – < 92	0.673
Phenylalanine (Phe)	49.5 ± 15	55.5 ± 13	>31 – < 92	0.133
Tyrosine (Tyr)	86.7 ± 39	79.5 ± 32	14 – 114	0.459
Leucine (Leu)	109.3 ± 46	117.9 ± 40	>43 – < 181	0.467
Methionine (Met)	41.6 ± 15	42.3 ± 14	>12 – < 55	0.864
Isoleucine (Ile)	7.5 ± 0.7	8.6 ± 2	28 – 92	0.065
Asparagine (Asn)	61.8 ± 35	55.3 ± 23	>20 – < 77	0.443
Proline (Pro)	222.4 ± 110	198 ± 98	>104 – < 348	0.396
Citrulline (Cit)	30.5 ± 13	25.8 ± 13	>4 – < 50	0.214
Cysteine (Cyst)	0.4 ± 0.3	0.4 ± 0.3	>0 – < 1	0.872
Arginine (Arg)	70 ± 30	53.8 ± 25.7	>30 – < 147	0.041
Ornithine (Orn)	92.8 ± 37	103.1 ± 44	>19 – < 139	0.364
Lysine (Lys)	166.8 ± 67	216 ± 93	>70 – < 258	0.029
Valine (Val)	140.1 ± 64	125.7 ± 40	>84 – < 354	0.333
Threonine (Thr)	179.1 ± 73	207.3 ± 89	>40 – < 428	0.205
Serine (Ser)	128.4 ± 52	134.5 ± 53	>83 – < 212	0.674
Alanine (Ala)	269.9 ± 110	306.5 ± 143	144 – 400	0.291
Aspartic acid (Asp)	10.9 ± 8	17.8 ± 7	0 – 25	0.002
Glutamine (Gln)	617.7 ± 145	461.8 ± 202	333 – 809	0.002
Glutamate (Glu)	102.3 ± 51	107.2 ± 64	24 – 110	0.625

Mann–Whitney-U test was used.