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Table 1 Participants included in the active comparator new user cohort study, IBM MarketScan Commercial Claims and Encounters Database, 2000–2014

From: Oral contraceptive use and anterior cruciate ligament injury: comparison of active comparator new user cohort and case-control study designs

  OC Initiators
n = 2,370,286
IUD Users
n = 621,798
Mean (SD) Range Mean (SD) Range
Age (years) 26.7 (8.1) 13, 45 32.4 (6.8) 13, 45
Follow-up (years) 1.1 (1.0) 0.2, 14.2 1.6 (1.5) 0.2, 14.5
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