Fig. 2

Necrotising enterocolitis, spontaneous gastrointestinal perforation, and death/necrotizing enterocolitis rates among different cohorts. NEC and its composite outcome in preterm infants born in Japan were significantly lower than all other cohorts in California (unadjusted logistic regression, p < 0.01). Although spontaneous intestinal perforation was lowest in non-Hispanic White infants, there was no significant difference among cohorts. (Refer to Table 2). Vertical bars show 95% confidential limits. NEC: necrotizong enterocolitis, SIP: spontanous intestinal perforation JP: Japan, CA: California, NHW: non-Hispanic White.