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. Author manuscript; available in PMC: 2014 May 13.
Published in final edited form as: Contraception. 2014 Jan 24;89(5):451–459. doi: 10.1016/j.contraception.2013.10.019

Table 1.

Health state transitions, per annual cycle

Method
failure (p)
Discontinuation
1st year (p)
Discontinuation
subsequent year (p)
Market
weight
LNG-IUS 13.5mg 0.00331 0.20002 0.05 1.000
SARC4 0.0870 0.3409 0.05 1.000
COC 0.09003 0.33003 0.05 0.789
Vaginal ring 0.09003 0.33003 0.05 0.082
Patch 0.09003 0.33003 0.05 0.021
Injectable 0.06003 0.44003 0.05 0.108
Subsequent method4 0.1443 0.3048 0.05 1.000
LNG-IUS 13.5mg 0.00331 0.20003 0.05 0.020
OCs 0.09003 0.33003 0.05 0.370
Ring 0.09003 0.33003 0.05 0.039
Patch 0.09003 0.33003 0.05 0.010
Injection 0.06003 0.44003 0.05 0.051
Implant 0.00053 0.16003 0.05 0.010
IUD 0.00803 0.22003 0.05 0.030
LNG-IUS 20mcg 0.00203 0.20003 0.05 0.030
Barrier Methods 0.18003 0.55503 0.05 0.218
Tubal ligation 0.00503 0.00003 0.05 0.046
Tubal occlusion 0.00503 0.00003 0.05 0.046
No method 0.46005 0.05006 0.05 0.129
1

Published source [12].

2

Assumption – set equal to LNG-IUS 20 mcg/24 hours (total content 52mg) discontinuation rate [8]

3

Published source [8].

4

Estimated for base case age group of 20–29 years as a weighted average – weights based on NSFG [7] (see ‘Market Weight’ column).

5

Published source [16].

6

Assumption.