Table 1.

Summary of patient samples and demographic per group

	Control (n = 28)	NEC (n = 7)	P value
Number of stool samples	520	121	–
Gestation (weeks)a	27 (24–30)	26 (23–30)	0.599
Birth weight (g)a	910 (545–1810)	760 (500–1470)	0.416
Birth mode (CS/vaginal)	15/13	3/4	1.0
Gender (male/female)	20/8	3/4	0.345
Antibiotic prediagnosis (days)a	–	14 (2–26)	–
Antibiotic total (days)a	4.5 (2–31)	29 (6–44)	0.0002

^aMedian (range)