Biopsy in emergency gastroscopy does not increase the risk of rebleeding in patients with Forrest I acute nonvariceal upper gastrointestinal bleeding combined with suspected malignant gastric ulcer: a multicenter retrospective cohort study

Table 7 Subgroup logistic regression analysis (clopidogrel group vs. aspirin group vs. non-use group) in the cohort before and after propensity score matching

	Before matching Rebleeding			After Matching Rebleeding
	Odds ratio	95% CI	P Value	Odds ratio	95% CI	P Value
Unadjusted
Non-use	Reference			Reference
Aspirin	1.144	0.875–1.496	0.324	1.022	0.714–1.462	0.905
Clopidogrel	0.988	0.644–1.518	0.958	1.048	0.600–1.828	0.870
Adjusted for all covariates^a
Non-use	Reference			Reference
Aspirin	0.673	0.446–1.016	0.059	0.757	0.480–1.194	0.231
Clopidogrel	0.740	0.446–1.227	0.243	0.735	0.373–1.449	0.374

^aAll variables in Table 2 were included as covariates for the model with hospital Rebleeding

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