“…This study showed a significant difference in crude rates of either LNG- or Cu-IUD expulsions by age group that ranged from 5.1% to 8.0% (p=.03); however, in adjusted models, there was no significant difference among women aged 13–19 years compared with 20–24 years (aHR 0.79, 95% CI 0.47–1.35, p=.39) or compared with women aged 25–35 years (aHR 0.68, 95% CI 0.40–1.13, p=.14) after adjusting for race and IUD type [12]. Two retrospective cohort studies (Level II-2, fair to poor) reported crude rates of expulsion for younger women compared with older women (aged <21 years versus 21–35 years and aged 13–17 years versus 18–24 years) for Cu- and LNG-IUD users and found no significant differences between age groups with rates ranging from 2.7% to 8.8% over 1 and 6 years of follow-up [21,24]. A retrospective cohort study (Level II-2, poor) that combined 938 NovaT and 717 Multiload 250 users reported cumulative 6-year rates of loss of IUD for those aged less than 20, 20–24, 25–29, 30–35 and 35+ years; loss of IUD was not further described.…”