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Escalation of drug use in early-onset cannabis users vs Co-twin controls

Identifieur interne : 004F82 ( PascalFrancis/Checkpoint ); précédent : 004F81; suivant : 004F83

Escalation of drug use in early-onset cannabis users vs Co-twin controls

Auteurs : Michael T. Lynskey [Australie, France] ; Andrew C. Heath [France] ; Kathleen K. Bucholz [France] ; Wendy S. Slutske [États-Unis] ; Pamela A. F. Madden [France] ; Elliot C. Nelson [France] ; Dixie J. Statham [Australie] ; Nicholas G. Martin [Australie]

Source :

RBID : Pascal:03-0110802

Descripteurs français

English descriptors

Abstract

Context Previous studies have reported that early initiation of cannabis (marijuana) use is a significant risk factor for other drug use and drug-related problems. Objective To examine whether the association between early cannabis use and subsequent progression to use of other drugs and drug abuse/dependence persists after controlling for genetic and shared environmental influences. Design Cross-sectional survey conducted in 1996-2000 among an Australian national volunteer sample of 311 young adult (median age, 30 years) monozygotic and dizygotic same-sex twin pairs discordant for early cannabis use (before age 17 years). Main Outcome Measures Self-reported subsequent nonmedical use of prescription sedatives, hallucinogens, cocaine/other stimulants, and opioids; abuse or dependence on these drugs (including cannabis abuse/dependence); and alcohol dependence. Results Individuals who used cannabis by age 17 years had odds of other drug use, alcohol dependence, and drug abuse/dependence that were 2.1 to 5.2 times higher than those of their co-twin, who did not use cannabis before age 17 years. Controlling for known risk factors (early-onset alcohol or tobacco use, parental conflict/ separation, childhood sexual abuse, conduct disorder, major depression, and social anxiety) had only negligible effects on these results. These associations did not differ significantly between monozygotic and dizygotic twins. Conclusions Associations between early cannabis use and later drug use and abuse/ dependence cannot solely be explained by common predisposing genetic or shared environmental factors. The association may arise from the effects of the peer and social context within which cannabis is used and obtained. In particular, early access to and use of cannabis may reduce perceived barriers against the use of other illegal drugs and provide access to these drugs.


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Pascal:03-0110802

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<div type="abstract" xml:lang="en">Context Previous studies have reported that early initiation of cannabis (marijuana) use is a significant risk factor for other drug use and drug-related problems. Objective To examine whether the association between early cannabis use and subsequent progression to use of other drugs and drug abuse/dependence persists after controlling for genetic and shared environmental influences. Design Cross-sectional survey conducted in 1996-2000 among an Australian national volunteer sample of 311 young adult (median age, 30 years) monozygotic and dizygotic same-sex twin pairs discordant for early cannabis use (before age 17 years). Main Outcome Measures Self-reported subsequent nonmedical use of prescription sedatives, hallucinogens, cocaine/other stimulants, and opioids; abuse or dependence on these drugs (including cannabis abuse/dependence); and alcohol dependence. Results Individuals who used cannabis by age 17 years had odds of other drug use, alcohol dependence, and drug abuse/dependence that were 2.1 to 5.2 times higher than those of their co-twin, who did not use cannabis before age 17 years. Controlling for known risk factors (early-onset alcohol or tobacco use, parental conflict/ separation, childhood sexual abuse, conduct disorder, major depression, and social anxiety) had only negligible effects on these results. These associations did not differ significantly between monozygotic and dizygotic twins. Conclusions Associations between early cannabis use and later drug use and abuse/ dependence cannot solely be explained by common predisposing genetic or shared environmental factors. The association may arise from the effects of the peer and social context within which cannabis is used and obtained. In particular, early access to and use of cannabis may reduce perceived barriers against the use of other illegal drugs and provide access to these drugs.</div>
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<s0>03-0110802</s0>
</fA47>
<fA60>
<s1>P</s1>
</fA60>
<fA61>
<s0>A</s0>
</fA61>
<fA64 i1="01" i2="1">
<s0>JAMA, the journal of the American Medical Association</s0>
</fA64>
<fA66 i1="01">
<s0>USA</s0>
</fA66>
<fC01 i1="01" l="ENG">
<s0>Context Previous studies have reported that early initiation of cannabis (marijuana) use is a significant risk factor for other drug use and drug-related problems. Objective To examine whether the association between early cannabis use and subsequent progression to use of other drugs and drug abuse/dependence persists after controlling for genetic and shared environmental influences. Design Cross-sectional survey conducted in 1996-2000 among an Australian national volunteer sample of 311 young adult (median age, 30 years) monozygotic and dizygotic same-sex twin pairs discordant for early cannabis use (before age 17 years). Main Outcome Measures Self-reported subsequent nonmedical use of prescription sedatives, hallucinogens, cocaine/other stimulants, and opioids; abuse or dependence on these drugs (including cannabis abuse/dependence); and alcohol dependence. Results Individuals who used cannabis by age 17 years had odds of other drug use, alcohol dependence, and drug abuse/dependence that were 2.1 to 5.2 times higher than those of their co-twin, who did not use cannabis before age 17 years. Controlling for known risk factors (early-onset alcohol or tobacco use, parental conflict/ separation, childhood sexual abuse, conduct disorder, major depression, and social anxiety) had only negligible effects on these results. These associations did not differ significantly between monozygotic and dizygotic twins. Conclusions Associations between early cannabis use and later drug use and abuse/ dependence cannot solely be explained by common predisposing genetic or shared environmental factors. The association may arise from the effects of the peer and social context within which cannabis is used and obtained. In particular, early access to and use of cannabis may reduce perceived barriers against the use of other illegal drugs and provide access to these drugs.</s0>
</fC01>
<fC02 i1="01" i2="X">
<s0>002B03D</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE">
<s0>Cannabis</s0>
<s2>NS</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Cannabis</s0>
<s2>NS</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Cannabis</s0>
<s2>NS</s2>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE">
<s0>Drogue illicite</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG">
<s0>Illicit drug</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA">
<s0>Droga ilícita</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE">
<s0>Toxicomanie</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG">
<s0>Drug addiction</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA">
<s0>Toxicomanía</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE">
<s0>Facteur risque</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG">
<s0>Risk factor</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA">
<s0>Factor riesgo</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE">
<s0>Homme</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Human</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Hombre</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE">
<s0>Précoce</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG">
<s0>Early</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA">
<s0>Precoz</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE">
<s0>Epidémiologie</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG">
<s0>Epidemiology</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA">
<s0>Epidemiología</s0>
<s5>07</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE">
<s0>Cannabidaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG">
<s0>Cannabidaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA">
<s0>Cannabidaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE">
<s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="ENG">
<s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="SPA">
<s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="FRE">
<s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="ENG">
<s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="SPA">
<s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="FRE">
<s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="ENG">
<s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="SPA">
<s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="FRE">
<s0>Santé publique</s0>
<s5>37</s5>
</fC07>
<fC07 i1="05" i2="X" l="ENG">
<s0>Public health</s0>
<s5>37</s5>
</fC07>
<fC07 i1="05" i2="X" l="SPA">
<s0>Salud pública</s0>
<s5>37</s5>
</fC07>
<fN21>
<s1>062</s1>
</fN21>
<fN82>
<s1>PSI</s1>
</fN82>
</pA>
</standard>
</inist>
<affiliations>
<list>
<country>
<li>Australie</li>
<li>France</li>
<li>États-Unis</li>
</country>
<region>
<li>Missouri (État)</li>
</region>
<settlement>
<li>Saint-Louis (Missouri)</li>
</settlement>
<orgName>
<li>Université Washington de Saint-Louis</li>
<li>École de médecine (Université Washington de Saint-Louis)</li>
</orgName>
</list>
<tree>
<country name="Australie">
<noRegion>
<name sortKey="Lynskey, Michael T" sort="Lynskey, Michael T" uniqKey="Lynskey M" first="Michael T." last="Lynskey">Michael T. Lynskey</name>
</noRegion>
<name sortKey="Martin, Nicholas G" sort="Martin, Nicholas G" uniqKey="Martin N" first="Nicholas G." last="Martin">Nicholas G. Martin</name>
<name sortKey="Statham, Dixie J" sort="Statham, Dixie J" uniqKey="Statham D" first="Dixie J." last="Statham">Dixie J. Statham</name>
</country>
<country name="France">
<region name="Missouri (État)">
<name sortKey="Lynskey, Michael T" sort="Lynskey, Michael T" uniqKey="Lynskey M" first="Michael T." last="Lynskey">Michael T. Lynskey</name>
</region>
<name sortKey="Bucholz, Kathleen K" sort="Bucholz, Kathleen K" uniqKey="Bucholz K" first="Kathleen K." last="Bucholz">Kathleen K. Bucholz</name>
<name sortKey="Heath, Andrew C" sort="Heath, Andrew C" uniqKey="Heath A" first="Andrew C." last="Heath">Andrew C. Heath</name>
<name sortKey="Madden, Pamela A F" sort="Madden, Pamela A F" uniqKey="Madden P" first="Pamela A. F." last="Madden">Pamela A. F. Madden</name>
<name sortKey="Nelson, Elliot C" sort="Nelson, Elliot C" uniqKey="Nelson E" first="Elliot C." last="Nelson">Elliot C. Nelson</name>
</country>
<country name="États-Unis">
<noRegion>
<name sortKey="Slutske, Wendy S" sort="Slutske, Wendy S" uniqKey="Slutske W" first="Wendy S." last="Slutske">Wendy S. Slutske</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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