Table 3 Comparison of the weight gain of preterm infants in the fresh human milk and control groups.

Weight	Fresh Human Milk (N = 98) mean ± SD	Control^a (N = 109) mean ± SD	P value
Birth weight z-score	0.35 ± 0.90	0.25 ± 0.83	0.42
Weight z-score at 7 days of age	−0.38 ± 0.77	−0.11 ± 0.44	0.34
Weight z-score at 14 days of age	−0.35 ± 2.1	−0.71 ± 0.66	0.10
Weight z-score at 21 days of age	−0.70 ± 0.74	−0.64 ± 2.40	0.80
Weight z-score at 28 days of age	−0.92 ± 0.75	−1.08 ± 0.68	0.13
Weight z-score at 35 days of age	−1.19 ± 0.74	−1.28 ± 0.69	0.44
Weight z-score at 42 days of age	−1.51 ± 0.72	−1.58 ± 0.68	0.62
Weight z-score at 49 days of age	−1.70 ± 0.77	−1.74 ± 0.68	0.77
Weight z-score at 56 days of age	−1.93 ± 0.71	−1.97 ± 0.67	0.83
Weight z-score at 63 days of age	−1.91 ± 0.78	−2.17 ± 0.61	0.25
Change in weight z-score^b	−1.72 ± 0.32	−2.10 ± 0.52	0.01

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