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. Author manuscript; available in PMC: 2017 Feb 5.
Published in final edited form as: Am J Obstet Gynecol. 2015 Aug 7;213(5):662.e1–662.e8. doi: 10.1016/j.ajog.2015.08.001

Table 2.

Kaplan-Meier estimates of 1-, 2-, and 3-year continuation of baseline method chosen

1 Year 2 Year 3 Year

% 95% CI % 95% CI % 95% CI
Overall 76.7 75.4 – 77.9 64.2 62.6 – 65.5 56.2 54.5 – 57.5
LNG-IUD 87.3 85.8 – 88.6 76.7 74.8 – 78.5 69.8 67.6 – 71.7
Cu-IUD 84.5 80.7 – 87.3 76.3 72.1 – 79.8 69.7 65.1 – 73.7
Implant 81.9 78.3 – 84.7 68.7 64.7 – 72.3 56.4 51.8 – 60.3
DMPA 57.4 51.5 – 62.2 40.5 33.8 – 44.7 33.2 26.9 – 37.7
OCP 58.1 56.3 – 64.6 40.1 37.9 – 46.5 29.5 27.3 – 35.8
Ring 53.6 49.7 – 58.6 36.7 33.1 – 41.9 29.1 25.8 – 34.4
Patch 46.1 38.3 – 57.4 35.0 25.7 – 44.5 28.1 19.5 – 37.9
LARC 85.9 84.5 – 87.0 75.2 73.6 – 76.7 67.3 65.4 – 68.9
Non-LARC 55.6 54.2 – 59.4 38.7 36.9 – 42.1 30.2 28.5 – 33.5
Adolescents 14–19 years

LARC 82.1 77.9 – 85.6 68 63.0 – 72.5 52.6 47.2 – 57.7
Non-LARC 46.9 42.1 – 54.6 32.9 28.4 – 40.6 21.2 17.6 – 29.0
Adults 20–45 years

LARC 86.4 85.0 – 87.6 76.2 74.5 – 77.7 69.3 67.4 – 71.0
Non-LARC 57.4 55.7 – 61.3 39.9 37.6 – 43.4 31.9 29.8 – 35.4
a

LNG, levonorgestrel

b

IUD, intrauterine device

c

Cu, copper

d

DMPA, depomedroxyprogesterone acetate

e

Oral contraceptive pill

f

LARC, long-acting reversible contraceptive

g

CI, confidence Interval