[EpiData-list] Using time

Hi,

I have two variables that use the hours.

One with the start time of surgery and another with the time of completion of surgery.

How do I get with the times and calculate the time of surgery.

Thanks,

-------------------------------------- Silvano Cesar da Costa Departamento de Estatística Universidade Estadual de Londrina Fone: 3371-4346 --------------------------------------