[STATA] - Median calculation

[gopilth@yahoo.com]

Hi,

I have 100 subjects with 6 visits over a period of 6 month and their weight recorded at each visit. how can I calculate mean and SD of each subject's weight (all 6 visits),for all 100 subjects. Any help is appreciated.

Also,

I have 100 subjects with 6 visits over a period of 6 months. some may have less then 6 visits. how can i calculate the total subjects with more than or equal to 2 visits and also the median.