Piriformis syndrome (PS) data is often confused with other conditions ^[1] due to differences in definitions, survey methods and whether or not occupational groups or general population are surveyed. ^[2] This causes a lack of group harmony about the diagnosis and treatment of PS, affecting its epidemiology. ^[3] In a study, 0.33% of 1293 patients with lower back pain cited an incident for PS. ^[3] A separate study showed 6% of 750 patients with the same incidence. ^[3] About 6% - 8% of lower back pain occurrences were attributed to PS, ^{[4] [5]}though other reports concluded about 5% - 36%. ^[1] In a survey conducted on the general population, 12.2% - 27% included a lifetime occurrence of PS, while 2.2% - 19.5% showed an annual occurrence. However further studies show that the proportion of the sciatica, in terms of PS, is about 0.1% in orthopaedic practice. ^[2] This is more common in women with a ratio of 3 to 1 ^[3] and most likely due to the wider quadriceps femoris muscle angle in the os coxae. ^[1] Between the years of 1991- 1994, PS was found to be 75% prevalent in New York, Connecticut, New Jersey, Pennsylvania; 20% in other American urban centers; and 5% in North and South America, Europe, Asia, Africa and Australia. ^[4] The common ages of occurrence happen between thirty and forty, and are scarcely found in patients younger than twenty; ^[3] this has been known to affect all lifestyles. ^[1]