How to Interpret the Results Section of a Research Paper

To interpret the Results section, first find the primary outcome and its effect size with a confidence interval, check the participant flow and baseline table, then judge whether secondary and subgroup findings are described as exploratory. Do not rely on p-values alone.

What to look for

• Participant flow: how many were screened, included and analysed; how many were lost.
• Baseline table: are groups comparable? Imbalance suggests confounding in observational studies or chance in trials.
• Primary outcome: the pre-specified result, with effect size (for example a risk ratio, mean difference) and 95% confidence interval.
• Absolute numbers: event rates in each group, which make effects easier to understand.
• Secondary and subgroup analyses: more tests mean more chance of false positives.
• Missing data and adjustments: what was done and how many were affected.

Reading a result sentence

"Mean systolic pressure fell by 6.2 mm Hg more in the intervention group (95% CI 2.1 to 10.3; p = 0.003)." The estimate is 6.2; plausible values range from 2.1 to 10.3; the p-value suggests the data are unlikely if the true difference were zero, but you must also ask whether a 2 to 10 mm Hg difference is clinically important. See Statistical Significance vs Clinical Significance.

Illustrative example

Invented for teaching. A trial reports "significant improvement" in 1 of 12 secondary outcomes (p = 0.04) but not in the primary outcome (p = 0.30). The honest summary is that the primary outcome showed no clear effect and the secondary finding is exploratory and may be chance.

Common pitfalls

• Reading only "significant" results.
• Ignoring confidence intervals.
• Treating subgroup differences as proof without an interaction test.

Key takeaways

• Start with the primary outcome, effect size and interval.
• Check flow, baseline balance and missing data.
• Treat secondary and subgroup results cautiously.

This page is general educational information about research methods. It is not medical, legal or regulatory advice; follow your institution's ethics board and your target journal's instructions.