Difference between standard error and standard deviation
It is important to distinguish carefully between the standard deviation of a sample and the standard error of the sample mean.
Be careful that you do not confuse the two terms (or misinterpret the values).
Illustration
Warning
Be particularly careful when reading journal articles. Some papers use standard deviations (SD) to describe the distribution of variables, but others give the standard errors (SE) of the means of the variables.
When tables of variables are shown in journal papers, check whether the tables show mean ± SD or mean ± SE.