Table 2.

Categories of Presentation of Difference

Numerical difference
No data	No raw data are provided
Raw data only	Only the raw data are provided
Raw data + relative	The raw data are provided along with a measure of relative difference (e.g., RRR)
Raw data + absolute	The raw data are provided along with a measure of absolute difference (e.g., ARR)
Raw data + relative + absolute	The raw data are provided along with both a measure of relative and a measure of absolute difference
Statistical difference
No statistics	No mention of statistical significance, no P value, no confidence interval
Reported significance	Statistical significance or lack thereof is mentioned verbally only
P value	P value is present
95% confidence interval	The 95% confidence interval is provided
P value + confidence interval	Both the P value and the confidence interval are provided