Children exposed to cocaine/cannabis before birth had more health problems over 4 years
Children prenatally exposed to cocaine and/or cannabis had fewer health checkups, more emergency visits, more hospitalizations (mainly respiratory), and more family disruption over four years compared to unexposed children.
Quick Facts
What This Study Found
Exposed children (n=29) had significantly fewer health checkups (p<0.0001), more emergency department visits (p=0.03), and more hospitalizations (p=0.007), primarily for respiratory conditions. They also had higher rates of chronic obstructive pulmonary disease, more changes of home, and more legal interventions. One exposed child and two parents had violent deaths; no deaths occurred in the unexposed group.
Key Numbers
29 exposed, 58 unexposed children. Fewer checkups (p<0.0001). More ER visits (p=0.03). More hospitalizations (p=0.007). 1 child death and 2 parent deaths in exposed group. 0 deaths in unexposed group.
How They Did This
Retrospective cohort study with a double control group in La Pampa, Argentina. 29 exposed children detected through urine testing at birth and 58 unexposed children followed for 4 years (2009-2013).
Why This Research Matters
Most prenatal cannabis/cocaine exposure studies focus on birth outcomes. This study tracks children over four years, capturing ongoing health and social consequences.
The Bigger Picture
The social disruption (home changes, legal interventions, violent deaths) highlights that prenatal drug exposure often occurs alongside broader family instability, making it difficult to isolate the biological effects.
What This Study Doesn't Tell Us
Very small sample (29 exposed). Most mothers were poly-drug users, so cannabis effects cannot be separated from cocaine. Retrospective design. Single hospital in Argentina. Social confounders are significant.
Questions This Raises
- ?How much of the difference is due to prenatal drug exposure versus ongoing family instability?
- ?Would targeted support services for these families improve child outcomes?
Trust & Context
- Key Stat:
- 29 exposed children tracked for 4 years
- Evidence Grade:
- Small retrospective cohort with significant confounding from poly-drug use and social factors.
- Study Age:
- 2019 study using 2009-2013 data from Argentina.
- Original Title:
- Four-year health trajectories of children prenatally exposed to cocaine and/or cannabis. A retrospective, cohort study in La Pampa, Argentina.
- Published In:
- Archivos argentinos de pediatria, 117(6), 360-367 (2019)
- Database ID:
- RTHC-02335
Evidence Hierarchy
Looks back at existing records to find patterns.
What do these levels mean? →Frequently Asked Questions
Does prenatal cannabis exposure cause health problems in children?
This study found more hospitalizations and ER visits in exposed children, but most mothers used multiple substances and faced social instability, making it impossible to attribute effects specifically to cannabis.
What health problems did exposed children have?
Hospitalizations were primarily for respiratory conditions. Exposed children also had fewer routine health checkups and more family disruption including home changes and legal interventions.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-02335APA
Villarreal, Marina; Belmonte, Valeria; Abdala, Agustina; Olivares, Jorge L. (2019). Four-year health trajectories of children prenatally exposed to cocaine and/or cannabis. A retrospective, cohort study in La Pampa, Argentina.. Archivos argentinos de pediatria, 117(6), 360-367. https://doi.org/10.5546/aap.2019.eng.360
MLA
Villarreal, Marina, et al. "Four-year health trajectories of children prenatally exposed to cocaine and/or cannabis. A retrospective, cohort study in La Pampa, Argentina.." Archivos argentinos de pediatria, 2019. https://doi.org/10.5546/aap.2019.eng.360
RethinkTHC
RethinkTHC Research Database. "Four-year health trajectories of children prenatally exposed..." RTHC-02335. Retrieved from https://rethinkthc.com/research/villarreal-2019-fouryear-health-trajectories-of
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.