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Table 13 Characteristics of included studies- renal pelvis and ureter

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
 Linet MS [211], 1995, US M/F 1983–1986 Cancer registries in New Jersey,Iowa and Los Angeles 418 405 Renal pelvis and ureter cancer Questionnaire Use 2 or more doses per week for at least 1 month or longer(regular) 1,2,3,7 8
 Mccredie M [207], 1993, Australia M/F 1989–1990 The NSW Central Cancer Registry 147 523 Renal pelvis cancer Questionnaire Had ever taken the drug 20 or more times 1,2,3,5,8 7
 Ross RK [212], 1989, US M/F 1978–1982 The Cancer Surveillance Program in Los Angeles County 187 187 Renal pelvis and ureter cancer Telephone interviews Use aspirin for more than 30 days in a single year 1,2,6 8
 Jensen OM [213], 1989, Denmark M/F 1979–1982 Patients in hospitals of Copenhagen 90 251 Renal pelvis and ureter cancer Face-to-face interviews Use of aspirin - not further defined 1,2,4 7
  1. 1 = age, 2 = sex, 3 = smoking, 4 = hospital, 5 = educational level, 6 = race, 7 = geographic site, 8 = method of interview