Studies on the same intervention can reach different conclusions for several non-mysterious reasons: different patient populations, different outcome measures, different follow-up windows, different definitions of response or remission, different control conditions, and chance.
Where the disagreement actually comes from
When two systematic reviews of the same intervention reach different conclusions, the difference is usually traceable to inclusion criteria and outcome definitions, not to one being right and the other wrong.
Practical advice
When conflicting headlines appear, look at the underlying review's inclusion criteria, outcome measure, and follow-up window before reading the result.
Why this matters for reading research on anxiety
Apparent contradictions in anxiety research often dissolve once you read the methods section. Knowing where to look saves time and prevents whiplash.
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