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Table 2 Patients’ continuation of fibromyalgia treatment a

From: Patterns of health care utilization related to initiation of amitriptyline, duloxetine, gabapentin, or pregabalin in fibromyalgia

  Amitriptyline Pregabalin Duloxetine Pregabalin Gabapentin Pregabalin
Number of patients 8,269 8,269 9,941 9,941 18,613 18,613
Treatment duration       
  0 to 90 days 80.9 79.7 63.5 78.6 78.1 75.7
  91 to 180 days 11.2 12.4 20.0 13.0 13.0 14.3
  181 to 270 days 3.4 4.1 7.6 4.2 4.2 4.9
  271 to 365 days 2.1 1.7 4.0 1.7 2.1 2.2
  Over 365 days 2.4 1.2 4.9 2.5 2.7 2.8
PDC up to 180 days 38.6 ± 30.1 50.0 ± 31.2 55.0 ± 34.0 67.8 ± 33.4 45.0 ± 32.5 55.4 ± 32.4
  1. aPDC, Proportion of days covered. Data are percentage or mean ± SD.