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. 2011 Mar 18;20(10):1663–1668. doi: 10.1007/s00586-011-1764-z

Table 1.

Demographic characteristics and incidence and prevalence of piriformis syndrome

P group (n = 151) G group (n = 2,320)
Age (years) 54.5 ± 15.2 59.4 ± 15.1
Sex ratio (M/F) 76/75 1,051/1,269
Number of patients with Piriformis Syndrome (M/F) 61*(33/28) 317*(151/166)

P group Patients who received percutaneous endoscopic lumbar discectomy

G group General patients who visited the pain clinic for low back pain with/without lower leg pain

* P < 0.01