Time series data and tsset. To use Stata's time-series functions and analyses, you must first make sure that your data are, indeed, time-series. First, you must have a date variable that is in Stata date format. Secondly, you must make sure that your data are sorted by this date variable.
Patients were randomly assigned to either a control condition (opioid analgesia alone) or anxiolytic condition (opioid analgesia+lorazepam) and then asked to report their worst procedural pain for 4 consecutive days: a 2-day baseline period and a 2-day post-treatment period.
Ativan (generic name: lorazepam) is classified as a benzodiazepine medication used primarily for short-term treatment of anxiety and seizure activity. It is sometimes used to manage intractable insomnia, and as a sedative for hospitalized or aggressive patients.