Introduction

Confidence intervals for median can be calculated for continuous variables (with a normal or skewed distribution). 

Function

Basic command

centile varlist

Useful options

centile varlist, level(#)

Explanations
varlist	Insert the name(s) of the variable(s) that you want to use.
level(#)	Specify the confidence level. Default is 95.

More information help centile

Practical example

Dataset

StataData1.dta

Variable name	cognitive
Variable label	Cognitive test score (Age 15, Year 1985)
Value labels	N/A

centile cognitive

In this example, we can see that the median cognitive test score is 312, and the 95% confidence interval is 312-316.