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. 2021 Mar 17;3(2):otaa094. doi: 10.1093/crocol/otaa094

Figure 1.

Figure 1.

PRISMA flow diagram. *Nine studies were appropriate for meta-analysis based on the presence of a risk allele at NOD2. Five studies were appropriate for meta-analysis based upon the presence of separate NOD2 subtypes. Eight studies were appropriate for meta-analysis based on the presence of a risk allele at NOD2 specifically for surgical recurrences. Four studies were appropriate for meta-analysis based on the presence of a risk allele at NOD2 specifically for surgical recurrences after small bowel or ileocolonic resection. Three studies were appropriate for a time-to-event analysis based on the presence of a risk allele at NOD2.