Table 2

Median number of patients enrolled in each study type

Type of studyMedian number of patients (IQR)*
All studies (excluding systematic review and narrative review)46 (66)
Case series41 (68)
Narrative reviews36 178 (36 136.5)
Cohort studies57 (n/a)†
Systematic reviews25 760 (24 706)
  • *Studies that did not state patient numbers were not included in calculations.

  • †Only one cohort study was found.

  • n/a, not applicable.