Extreme Heterogeneity Qualified an Acute THC Pressure Estimate in Hypertensive and Stressed Rats
An acute THC pressure reduction pooled from stressed or hypertensive rat models had extremely high heterogeneity. The statistically significant average was not a stable prediction of the response in every model.
The pooled estimate combined different disease conditions
The review grouped rat models of stress and hypertension. It reports a large acute average blood-pressure reduction, with I-squared of 99%. Such marked inconsistency means the individual comparisons varied substantially beyond what sampling error alone would usually explain under the model.
Statistical significance did not remove that variation
A pooled confidence interval can exclude zero while the underlying results remain highly heterogeneous. The average therefore needs its context; it cannot serve as an expected reduction for every rat, much less a patient. The review also reports a chronic-dosing analysis with lower heterogeneity, but that separate result does not repair uncertainty in the acute pool.
The clinical inference remained untested
The experiments did not establish THC as an antihypertensive treatment in humans or supply a safe dose for that purpose. Stress and hypertension models also differ in their mechanisms and baseline conditions. A careful appraisal reports the direction, uncertainty and heterogeneity together. This allows a potentially relevant animal signal to inform research without presenting an unstable cross-model average as a clinical treatment effect.
Related analysis: the study’s broader findings and limitations.
