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Table 2 Papers included in meta-analysis of association between cannabis use and testicular cancer development, with study meta-data

From: Cannabis exposure and risk of testicular cancer: a systematic review and meta-analysis

Author Year of publication Study design Study period Year of data collection Location of study Sample size Source of data Exclusion criteria Method of cannabis exposure measurement Adjustment for confounding
Daling, et al. [9] 2009 CCSc 1999–2006 2006 Washington State, U.S.A. 369 cases/979 controls Face-to-face interview -Non-germ cell tumours
-Choriocarcinoma
-Age (<18 or >44)
-No telephone
-Non-English-speaking
Self-reported use of marijuana or hashish:
-Ever-use
-Age at first use
-Duration of use
-Frequency of use
-Countya
-Agea, b
-Reference yeara, b
-Alcohol useb
-Smoking statusb
-Cryptorchidismb
Trabert et al. [7] 2011 CCSc 1990–1996 1996 Texas, U.S.A. 187 cases/148 controls Self-completed questionnaire -Non-germ-cell tumours
-Age (<18 or >50)
-Extragonadal tumours
Self-reported:
-Ever-use
-Duration of use
-Frequency of use
-Agea, b
-Racea, b
-Alcohol useb
-Smoking statusb
-Cryptorchidismb
Lacson et al. [8] 2012 CCSc 1986–1991 1987–1991 California, U.S.A. 163 cases/292 controls Face-to-face interview -Non-germ cell tumours
-Age (<18 or >35)
-Non-English-speaking
-Born in U.S.A., Canada, Europe or Middle East
Self-reported:
-Ever-use
-Duration of use
-Frequency of use
-Agea
-Racea
-Ethnicitya
-Neighbourhooda
-Cocaine useb
-Amyl Nitrate useb
-Cryptorchidismb
-Religiosityb
-Educationb
  1. aAdjustment for confounding achieved via control matching
  2. bAdjustment for confounding achieved via inclusion as covariates in regression models
  3. c CCS case–control study