Mapping of Incontinence Quality of Life (I-QOL) scores to Assessment of Quality of Life 8D (AQoL-8D) utilities in patients with idiopathic overactive bladder

Table 5 Mapping equations from I-QOL score to AQoL-8D utility

	OLS		MM-estimator		GLM^‡
	Coeff.	SE	Coeff.	SE	Coeff.	SE
Model 1 (using I-QOL total score)
I-QOL^†	0.5697422	0.0747355**	0.6172410	0.0730065**	1.0110720	0.1441272**
Constant	0.1732625	0.0598689**	0.1370898	0.0615673*	–1.2866600	0.1225249**
Model 2 (using I-QOL subscale scores)
I-QOL-PS^†	0.3469097	0.1252910**	0.5913308	0.0627952**	0.6703759	0.2472593**
I-QOL-SE^†	0.1985825	0.0938378*			0.3521859	0.1691879*
Constant	0.1787669	0.0690521**	0.1165455	0.0564778*	–1.3254590	0.1526178**

SE - standard errors. *p < 0.05, **p < 0.01. ^†The I-QOL total/subscale scores included in the regression model were calculated as original scores divided by 100. ^‡The Gaussian family with log link was used.
I-QOL-PS: I-QOL Psychosocial Impacts; I-QOL-SE: I-QOL Social Embarrassment.

ISSN: 1477-7525