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Table 21 Characteristics of included studies- small intestine neuroendocrine tumors

From: Associations between aspirin use and the risk of cancers: a meta-analysis of observational studies

Study source Sex Study period Source of subjects No of case No of control/cohort size Cancer site Exposure assessment Exposure Definition Adjustment for covariates Study quality
Case-control studies
 Rinzivillo M [260], 2016, Italy M/F 2009–2012 Population from Universities of Rome and Bologna and at the European Institute of Oncology 215 860 Small Intestine Neuroendocrine Tumors Questionnaire Use at any dose at least twice a week for more than one consecutive year 1,2, 7
  1. 1= age, 2=sex