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Table 3 Pooled (age groups 20–25 and > 25) continuation rates (%) from OS and RCT by age

From: Cross design analysis of randomized and observational data – application to continuation rates for a contraceptive intra uterine device containing Levonorgestrel in adolescents and adults

Data source Age group n Continuation rate year 1 (in %) Continuation rate year 1 (95%-Confidence Interval) Continuation rate year 2 (in %) Continuation rate year 2 (95%-Confidence Interval)
OS > 20 3367 86.36 (85.30, 87.43) 76.11 (75.05, 77.18)
< 20 362 81.33 (77.16, 85.50) 69.00 (64.10, 73.90)
RCT > 20 253 87.32 (83.20, 91.43) 79.22 (74.18, 84.25)
< 20 NA NA NA NA NA