The frequency of palpitations episodes scale
All participants completed a 7 point rating scale of the frequency of
their palpitations episodes: 1=rarely (about once or twice a day),
2=sometimes (3-5 times a day), 3=more than 5 times a day but less than
once an hour, 4=about once or twice an hour, 5= 3-5 times an hour,
6=more than 5 times an hour but not sustained, and 7=sustained. A higher
palpitation score indicates a higher frequency of palpitations episodes.