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Table 2 Age of participants included in the “ever” versus “never” case-control study replication, 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

1 Year Lookback

Cases n = 50,215

Controls n = 100,429

Mean (SD)

Range

Mean (SD)

Range

25.6 (10.4)

13, 45

25.6 (10.4)

13, 45

5 Year Lookback

Cases n = 11,022

Controls n = 22,044

Mean (SD)

Range

Mean (SD)

Range

23.9 (10.4)

13, 45

23.9 (10.4)

13, 45

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Injury Epidemiology

ISSN: 2197-1714