We recommend a format for communicating an estimate with its standard error or confidence interval. The format reinforces that the associated variability is an inseparable component of the estimate and it substantially improves clarity in tabular displays.
Louis, Thomas A. and Zeger, Scott L., "EFFECTIVE COMMUNICATION OF STANDARD ERRORS AND CONFIDENCE INTERVALS" (August 2007). Johns Hopkins University, Dept. of Biostatistics Working Papers. Working Paper 151.