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. Author manuscript; available in PMC: 2016 Feb 15.

Published in final edited form as: Int J Cancer. 2014 Jun 30;136(4):894–903. doi: 10.1002/ijc.29036

Table 1. Characteristics of participating studies in the pooled analysis of Cannabis smoking and lung cancer risk.

Continent and study	Principal investigator(s)	Control source (matching factor)	Study period	Location	Cannablis consumption
Continent and study	Principal investigator(s)	Control source (matching factor)	Study period	Location	Lead question(s)	Age start	Age quit	Intensity	Joint-years	Cases	Controls
*North America*
University of California, Los Angeles (UCLA)¹⁶	Z.F. Zhang H. Morgenstern	Population-based (age, sex, neighborhood)	1999-2004	Los Angeles County, California, US	Have you ever smoked marijuana? Have you ever smoked hashish or hash oil?	^•	^•	^•	^•	610	1,037
Memorial Sloan-Kettering Cancer Center (MSKCC)	I. Orlow	Hospital-based (age, residence)	2003-2006	New York City, US	Do you or have you ever used marijuana?	^•		^•	^•	94	87
Mount Sinai Hospital-Princess Margaret Hospital Study (MSH-PMH)²⁸	R.J. Hung, G. Liu	Clinic-based (age, sex, residence)	2008-2013	Ontario, Canada	Have you ever used or tried marijuana, cannabis, or hashish?	^•	^•	^•	^•	431	308
Moffitt Cancer Study²⁹	P. Lazarus	Hospital-based (sex, race, residence)	1999-2003	Florida, US	Have you ever used marijuana at least once a day for one year?	^•	^•	^•	^•	497	897
*Europe*
ReSoLuCENT³⁰	M.D. Teare P.J. Woll	Family and clinic-based (race/residence)	2006-2009	North Trent, UK	Have you ever used any other tobacco-related products (such as chewing tobacco, cannabis, snuff, etc)?			^•	^•	449	332
*Oceania*
New Zealand¹⁵	B. Cox	Population-based (age, sex, race)	2001-2005	New Zealand	Have you smoked more than 20 joints (of marijuana) (or the equivalent) in your lifetime?	^•	^•	^•	^•	78	324
Total										2,159	2,985

Abbreviations: US, United States; UK, United Kingdom;

^•

data element collected.