Dear Statalisters,
I'm using the following Stata command (see help mean):
mean x, std(a) stdw(b) over(c)
to get age-standardised mean or proportion of a variable of interest x. a= variable for age-group and b= variable for weights for each group. x can be a continuous variable or a binomial variable. My question is how does Stata calculate 95% CI for such direct age-standardised means/proportions? What method/approximation is used? I tried to look up relevant help files under Methods but couldnt really understand. Please help. Many
Thanks Amit A, UNSW.,
I'm using the following Stata command (see help mean):
mean x, std(a) stdw(b) over(c)
to get age-standardised mean or proportion of a variable of interest x. a= variable for age-group and b= variable for weights for each group. x can be a continuous variable or a binomial variable. My question is how does Stata calculate 95% CI for such direct age-standardised means/proportions? What method/approximation is used? I tried to look up relevant help files under Methods but couldnt really understand. Please help. Many
Thanks Amit A, UNSW.,
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