. Author manuscript; available in PMC: 2019 Dec 1.

Published in final edited form as: J Sex Med. 2018 Oct 24;15(12):1792–1810. doi: 10.1016/j.jsxm.2018.09.015

Table 3.

Model and Item Fit of PROMIS and PCSISDS Sex-Related Measures.

Domain – Version	Time	Descriptive Statistics	Model Fit	Item ID	λ	LD Grouping Labels (Time- Specific)	# of Significant Monotonicity Violations
PROMIS Sexual Interest - NC ProCESS	Baseline	N = 329 Alpha = 0.812	$χ_{5}^{2}$ = 36.46.p < 0.001 RMSEA = 0.138 CFI = 0.996 WRMR = 0.591	SEXFCNl^┼╪§	0.923	i, ii	None
				$EXFCN2^┼§	0.979	iii	None
				SEXFCN3^┼╪§	0.920	iv	None
				SEXFCN4^┼	0.735	i. iv	None
				SEXFCN5	0.121	ii, in	1
	3-Month	N = 397 Alpha = 0.738	$χ_{5}^{2}$ = 56.87, p< 0.001 RMSEA = 0.162 CFI = 0.992 WRMR = 0.881	SEXFCNl^┼╪§	0.942	i	None
				$EXFCN2^┼§	0.927	ii	None
				SEXFCN3^┼╪§	0.901	lii	None
				SEXFCN4^┼	0.768	lii	None
				SEXFCN5	−0.124	i, ii	6
	12-Month	N = 759 Alpha = 0.757	$χ_{5}^{2}$ = 100.73. p< 0.001 RMSEA = 0.159 CFI = 0.995 WRMR = 1.054	SEXFCNl^┼╪§	0.930	i	None
				SEXFCN2^┼§	0.957	i	None
				SEXFCN3^┼╪§	0.938	ii. in	None
				SEXFCN4^┼	0.775	ii	None
				SEXFCN5	−0.114	i, in	30
	24-Month	N = 928 Alpha = 0.772	$χ_{5}^{2}$ = 62.42, p< 0.001 RMSEA = 0.111 CFI = 0.996 WRMR = 0 881	SEXFCNl^┼╪§	0.914	i	None
				$EXFCN2^┼§	0.959	ii	None
				SEXFCN3^┼╪§	0.917	lii	1
				SEXFCN4^┼	0.756	lii	None
				SEXFCN5	−0.054	i, ii	18
PROMIS Sexual Interest — SexFS-Preferretl	Baseline	N = 330 Alpha = 0.918	Just-identified	SEXFCNl^┼╪§	0.907	None	None
				$EXFCN2^┼§	0.998	None	None
				SEXFCN3^┼╪§	0.908	None	None
	3-Month	N = 400 Alpha = 0.897	Just-identified	SEXFCNl^┼╪§	0.945	None	None
				$EXFCN2^┼§	0.933	None	None
				SEXFCN3^┼╪§	0.885	None	None
	12-Month	N = 760 Alpha = 0.923	Just-identified	SEXFCNl^┼╪§	0.928	None	None
				$EXFCN2^┼§	0.966	None	None
				SEXFCN3^┼╪§	0.926	None	None
	24-Month	N = 932 Alpha = 0.909	Just-identified	SEXFCNl^┼╪§	0.912	None	None
				SEXFCN2^┼§	0.964	None	None
				SEXFCN3^┼╪§	0.906	None	None
PROMIS Erectile Function - NC ProCESS	Baseline	N = 245 Alpha = 0.S90	$χ_{14}^{2}$ = H 5–73. p < 0.001 RMSEA = 0.173 CFI = 0.981 WRMR = 0.980	ERECFCNl^┼╪§	0.917	None	None
				ERECFCN2^╪	0.889	None	None
				ERECFCN3^┼╪§	0.915	i. il	None
				ERECFCN4^┼╪§	0.899	i. in	None
				ERECFCN5^┼╪§	0.157	ii	None
				ERECFCN6	0.840	iv	None
				ERECFCN7^┼╪§	0.820	iii. iv	None
	3-Month	N = 243 Alpha = 0.900	$χ_{14}^{2}$ ⁼ 162.26.p< 0.001 RMSEA = 0.209 CFI = 0.979 WRMR = 1.573	ERECFCNl^┼╪§	0.879	None	None
				ERECFCN2^┼╪§	0.890	None	None
				ERECFCN3^┼╪§	0.957	i	None
				ERECFCN4^┼╪§	0.925	i	None
				ERECFCN5^┼	0.310	i	None
				ERECFCN6	0.819	ii	None
				ERECFCN7^┼╪§	0.839	ii	None
	12-Month	N = 495 Alpha = 0.900	$χ_{14}^{2}$ = 320.32 p< 0.001 RMSEA = 0.210 CFI = 0.978 WRMR = 1.711	ERECFCNl^┼╪§	0.900	i	None
				ERECFCN2^╪	0.886	None	None
				ERECFCNS^┼╪§	0.922	ii. in	None
				ERECFCN4^┼╪§	0.935	ii	None
				ERECFCN5^┼	0.151	i. iii	None
				ERECFCN6	0.808	iv	None
				ERECFCN7^╪	0.882	iv	None
	24-Month	N = 591 Alpha = 0.891	$χ_{14}^{2}$ ⁼ 402.42,p < 0.001 RMSEA = 0.217 CFI = 0.977 WRMR = 2.231	ERECFCNl^┼╪§	0.902	i	None
				ERECFCN2^╪	0.862	i	None
				ERECFCN3^┼╪§	0.929	ii, in	None
				ERECFCN4^┼╪§	0.937	ii	None
				ERECFCN5^┼	0.091	iii	2
				ERECFCN6	0.787	iv	None
				ERECFCN7^╪	0.842	iv	None
PROMIS Erectile Function - SexFS-Preferretl	Baseline	N = 247 Alpha = 0.S95	Just-identified	ERECFCNl^┼╪§	0.892	None	None
				ERECFCN3^┼╪§	0.946	None	None
				EREC’FCN4^┼╪§	0.911	None	None
	3-Month	N = 246 Alpha = 0.903	Just-identified	EREC’FCN1^┼╪§	0.821	None	None
				ERECFCN3^┼╪§	0.999	None	None
				ERECFCN4^┼╪§	0.936	None	None
	12-Month	N = 499 Alpha = 0.910	Just-identified	ERECFCNl^┼╪§	0.862	None	None
				ERECFCN^┼╪§	0.955	None	None
				ERECFCN4^┼╪§	0.954	None	None
	24-Month	N = 595 Alpha = 0.914	Just-identified	ERECFCNl^┼╪§	0.852	None	None
				ERECFCNS^┼╪§	0.967	None	None
				EREC’FCN4^┼╪§	0.957	None	None
PROMIS Orgasm - NC ProCESS	Baseline	N = 233 Alpha = 0.371	$χ_{2}^{2}$ =4.02.p = 0.134 RM SEA = 0.066 CFI = 0.993 WRMR = 0.370	ORGl^┼	0.984	None	None
				ORG2^┼	−0.019	i	None
				ORG3^┼	0.051	i	None
				ORG4^╪	0.690	None	None
	3-Month	N = 227 Alpha = 0.267	$χ_{2}^{2}$ = 3.0 6,p = 0.217 RM SEA = 0.048 CFI = 0.997 WRMR = 0.304	ORGl^┼	0.865	i	None
				ORG2^┼	−0.37	i, li	1
				ORG3^┼	−0.064	None	None
				ORG4^╪	0.861	ii	None
	12-Month	N = 475 Alpha = 0.325	$χ_{2}^{2}$ = ¹⁶⁰⁹> p< 0.001 RMSEA = 0.122 CFI = 0.991 WRMR = 0.736	The IRT model did not converge after 5000 iterations.
	24-Month	N = 583 Alpha = 0.326	$χ_{2}^{2}$ = 17.28. p < 0.001 RMSEA = 0.115 CFI = 0.987 WRMR = 0.752	ORGl^┼	0.989	i	1
				ORG2^┼	−0.252	i, ii. lii	12
				ORG3^┼	−0.042	ii	2
				ORG4^╪	0.761	iii	3
PROMIS Sexual Satisfaction – NC ProCESS	Baseline	N = 225 Alpha = 0.929	$χ_{5}^{2}$ = 53.12, p< 0.001 RMSEA = 0.207 CFI = 0.992 WRMR = 0.919	GLOBSATl^┼╪§	0.893	i	None
				GLOBSAT2^┼╪§	0.931	i	None
				GLOBSAT4^┼╪	0.911	li	None
				GLOBSAT5^┼	0.903	ii	None
	3-Month	N = 204 Alpha = 0.939	$χ_{5}^{2}$ = 38.40, p< 0.001 RMSEA = 0.181 CFI = 0.995 WRMR = 0.614	GLOBSATl^┼╪§	0.922	None	None
				GLOBSATi^┼╪§	0.966	None	None
				GLOBSAT3^┼╪§	0.931	None	None
				GLOBSAT4^┼╪	0.859	i	None
				GLOBSAT5^┼	0.92	i	None
	12-Month	N = 447 Alpha = 0.940	$χ_{5}^{2}$ = 203.38. p< 0.001 RM SEA = 0.29S CFI = 0.988 WRMR = 1.618	GLOBSATl^┼╪§	0.894	i	None
				GLOBSAT2^┼╪§	0.926	i	None
				GLOBSAT3^┼╪§	0.932	None	None
				GLOBS AT4^┼╪	0.92	ii	None
				GLOBSAT5^┼	0.946	ii	None
	24-Month	N = 535 Alpha = 0.921	$χ_{5}^{2}$ =216.29,p < 0.001 RMSEA = 0.281 CFI = 0.983 WRMR = 1.919	GLOBSATl^┼╪§	0.872	i	None
				GLOBSAT2^┼╪§	0.898	i	None
				GLOBSAT3^┼╪§	0.895	i	None
				GLOBSAT4^┼╪	0.906	ii	None
				GLOBSAT5^┼	0.904	ii	None
PROMIS Sexual Satisfaction - SexFS-Preferred	Baseline	N = 225 Alpha = 0.908	Just-identified	GLOBSATl^┼╪§	0.918	None	None
				GLOBSAT2^┼╪§	0.963	None	None
				GLOB$AT3^┼╪§	0.896	None	None
	3-Month	N = 206 Alpha = 0.929	Just-identified	GLOBSATl^┼╪§	0.930	None	None
				GLOBSAT2^┼╪§	0.974	None	None
				GLOB$AT3^┼╪§	0.927	None	None
	12-Month	N = 447 Alpha = 0.914	Just-identified	GLOBSATl^┼╪§	0.923	None	None
				GLOBSAT2^┼╪§	0.952	None	None
				GLOBSAT3^┼╪§	0.920	None	None
	24-Month	N = 535 Alpha = 0.893	Just-identified	GLOBSATl^┼╪§	0.901	None	None
				GLOB$AT2^┼╪§	0.932	None	None
				GLOBSAT3^┼╪§	0.895	None	None
PC SI Erectile Function - Clark (2005)	Baseline	N = 882 Alpha = 0.860	Just-identified	E10	0.804	None	None
				E30	0.949	None	None
				E40	0.935	None	None
	3-Month	N = 464 Alpha = 0.900	Just-identified	E10	0.851	None	None
				E30	0.968	None	None
				E40	0.937	None	None
	12-Month	N = 474 Alpha = 0.891	Just-identified	E10	0.836	None	None
				E30	0.953	None	None
				E40	0.938	None	None
	24-Month	N = 421 Alpha = 0.881	Just-identified	E10	0.818	None	None
				E30	0.961	None	None
				E40	0.930	None	None
PCSI MOS Sexual Problems – Clark (2005), less two items	Baseline	N = 886 Alpha = 0.817	Just-identified	E140	0.807	None	None
				E150	0.913	None	None
				E160	0.868	None	None
	3-Month	N = 467 Alpha = 0.811	Just-identified	E140	0.773	None	None
				E150	0.906	None	None
				E160	0.872	None	None
	12-Month	N = 475 Alpha = 0.809	Just-identified	E140	0.754	None	None
				E150	0.909	None	None
				E160	0.858	None	None
	24-Month	N = 421 Alpha = 0.804	Just-identified	E140	0.801	None	None
				E150	0.872	None	None
				E160	0.818	None	None

λ= standardized factor loading

LD = local dependence

Alpha = Ordinal coefficient alpha, an internal consistency measure computed based on polychoric correlations (Gadermann et al., 2012)

$χ_{d f}^{2}$ = scaled chi-square statistic with df degrees of freedom

p = p value associated with the scaled chi-square statistic

RMSEA = scaled root mean square error of approximation

CFI = scaled comparative fit index

WRMR = weighted root mean square residuals

^┼

Items from PROMIS SexFS-V1 (Flynn et al., 2013). The underlined items are worded slightly differently than in PROMIS SexFS-V1.

^╪

Items from PROMIS SexFS-V2 (Weinfurt et al., 2015).

^§

Items in PROMIS SexFS-Preferred (best-fitting items in the current study)