A simple method for the diagnosis of premenstrual syndrome by use of a self-assessment disk

A diagnostic disk based on the obstetric calculator was developed for the self-assessment of menstrual cycle symptoms. The instrument, called the PMT-Cator (Rocket of London, Watford, England) can be used to monitor five symptoms for up to 6 weeks. A set of simple calculations are described inside the disk to determine whether the symptom scores are suggestive of premenstrual syndrome. Results of the PMT-Cator correlate well with those of more complex analysis. The PMT-Cator may have other uses as well.