. Author manuscript; available in PMC: 2015 Oct 15.

Published in final edited form as: Stat Med. 2014 May 27;33(23):3961–3972. doi: 10.1002/sim.6216

Table 3.

(Top) Unadjusted estimates and 95% confidence intervals (95% CI) for the prevalence of total durations longer than 12 and 24 months for the nonparametric and piecewise constant approaches. (Bottom) Regression coefficients and estimates intertility prevalence for 31-year old women that are parous (F̄(12|1, 0)) or nulliparious (F̄(12|0, 0)) from the semiparametric, and piecewise constant models.

Unadjusted
	Nonparametric		Piecewise
	est	95% ci	est	95% ci
F̄(12)	0.336	(0.212, 0.481)	0.223	(0.148, 0.310)
F̄(24)	0.223	(0.162, 0.290)	0.123	(0.082, 0.167)

Covariate Adjusted
	Semiparametric		Piecewise
	est	95% ci	est	95% ci

Parity	0.492	(0.257, 0.728)	0.747	(0.206, 1.289)
Age	−0.035	(−0.054,−0.015)	−0.036	(−0.074,0.003)
F̄(12\|1, 0)	0.303	(0.138, 0.463)	0.191	(0.110, 0.295)
F̄(12\|0, 0)	0.475	(0.291, 0.610)	0.358	(0.244, 0.473)