| Title |
The Effects of Childhood ADHD Symptoms on Early-onset Substance Use: A Swedish Twin Study
|
|---|---|
| Published in |
Research on Child and Adolescent Psychopathology, September 2011
|
| DOI | 10.1007/s10802-011-9575-6 |
| Pubmed ID | |
| Authors |
Zheng Chang, Paul Lichtenstein, Henrik Larsson |
| Abstract |
Research has documented that children and adolescents with attention-deficit/hyperactivity disorder (ADHD) are at increased risk of substance use problems. Few studies, however, have focused on early-onset substance use. This study therefore investigated how the two symptom dimensions of ADHD (hyperactivity/impulsivity and inattention) are associated with early-onset substance use, the role of persistent ADHD for the association, and to what extent the association is influenced by genetic and environmental factors. Twins (1,480 pairs) in the Swedish Twin Study of Child and Adolescent Development were followed from childhood to adolescence. ADHD symptoms were measured at age 8-9 and age 13-14 via parent-report, whereas substance use was assessed at age 13-14 via self-report. Results revealed that hyperactive/impulsive symptoms predicted early-onset "sometimes" tobacco use (adjusted odds ratios, 1.12, for one symptom count), controlling for inattentive symptoms and conduct problem behaviors. There is no independent effect of inattentive symptoms on early-onset substance use. Children with persistent hyperactivity/impulsivity (defined as scoring above the 75th percentile at both time points) had a pronounced risk of both early-onset tobacco and alcohol use (adjusted odds ratios from 1.86 to 3.35, compared to the reference group). The associations between hyperactivity/impulsivity and early-onset substance use were primarily influenced by genetic factors. Our results indicated that hyperactivity/impulsivity, but not inattention, is an important early predictor for early-onset substance use, and a shared genetic susceptibility is suggested to explain this association. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 130 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Brazil | 1 | <1% |
| Sweden | 1 | <1% |
| South Africa | 1 | <1% |
| United Kingdom | 1 | <1% |
| Canada | 1 | <1% |
| Unknown | 125 | 96% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 22 | 17% |
| Student > Master | 21 | 16% |
| Researcher | 13 | 10% |
| Student > Doctoral Student | 10 | 8% |
| Student > Bachelor | 9 | 7% |
| Other | 31 | 24% |
| Unknown | 24 | 18% |
| Readers by discipline | Count | As % |
|---|---|---|
| Psychology | 44 | 34% |
| Medicine and Dentistry | 25 | 19% |
| Unspecified | 6 | 5% |
| Social Sciences | 5 | 4% |
| Neuroscience | 4 | 3% |
| Other | 14 | 11% |
| Unknown | 32 | 25% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 March 2012.
All research outputs
#16,047,334
of 25,373,627 outputs
Outputs from Research on Child and Adolescent Psychopathology
#1,289
of 2,047 outputs
Outputs of similar age
#95,103
of 142,688 outputs
Outputs of similar age from Research on Child and Adolescent Psychopathology
#14
of 30 outputs
Altmetric has tracked 25,373,627 research outputs across all sources so far. This one is in the 34th percentile – i.e., 34% of other outputs scored the same or lower than it.
So far Altmetric has tracked 2,047 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 9.5. This one is in the 34th percentile – i.e., 34% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 142,688 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 31st percentile – i.e., 31% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 30 others from the same source and published within six weeks on either side of this one. This one is in the 46th percentile – i.e., 46% of its contemporaries scored the same or lower than it.