Table 3:
Summary of Qualitative Evidence Concerning Intrauterine Cannabis Exposure and Infant/Childhood Development
| Developmental Outcome | Number of Studies Finding a Negative Impact of Cannabis Use | Number of Studies Finding No Impact of Cannabis Use | Percentage of Studies Obtaining an Adverse Effect of Cannabis Use |
|---|---|---|---|
| Birthweight | 6 | 4 | 60% |
| NICU Admission | 0 | 1 | 0% |
| Infant Mortality | 1 | 0 | 100% |
| Preterm Birth | 2 | 4 | 33.3% |
| Infant/Toddler Neurodevelopment | 1 | 0 | 100% |
| Infant/Toddler Attention | 2 | 0 | 100% |
| Infant/Toddler Language Development | 0 | 2 | 16.7% |
| Infant/Toddler Cognition (General) | 2 | 5 | 28.6% |
| Infant/Toddler Motor Development | 2 | 2 | 50% |
| Infant/Toddler Emotion Regulation | 0 | 2 | 0% |
| Infant/Toddler Internalizing Problems | 0 | 1 | 0% |
| Infant/Toddler Externalizing Problems | 1 | 0 | 100% |
| Early Childhood Neurodevelopment | 1 | 0 | 100% |
| Early Childhood Attention | 3 | 1 | 75% |
| Early Childhood Verbal Reasoning | 2 | 1 | 66.7% |
| Early Childhood Memory | 1 | 2 | 33.3% |
| Early Childhood Quantitative Reasoning | 1 | 0 | 100% |
| Early Childhood Executive Functioning | 0 | 1 | 0% |
| Early Childhood IQ | 0 | 1 | 0% |
| Early Childhood Internalizing Problems | 1 | 2 | 33.3% |
| Early Childhood Externalizing Problems | 2 | 1 | 66.7% |