Table 3.

Correlations among the DDRQOL-R, short form of DDRQOL-R, SF-36 (n = 184)

	Physical functioning	Role physical	Bodily pain	General health perception	Vitality	Social functioning	Role emotional	Mental health
DDRQOL-R
Satisfaction with diet	0.26**	0.24**	0.16*	0.40**	0.51 **	0.32**	0.35**	0.46 **
Burden of diet therapy	0.30**	0.26**	0.15*	0.41**	0.54**	0.17 *	0.27**	0.45 **
Perceived merits of diet therapy	0.12	0.06	0.05	0.05	0.15*	0.14	−0.01	0.11
General perception of diet	0.25**	0.18*	0.10	0.38**	0.37**	0.17*	0.13	0.28**
Restriction of social functions	0.13	0.28**	0.17*	0.28**	0.33**	0.45 **	0.35 **	0.36**
Vitality	0.42**	0.43**	0.39**	0.60**	1.00**	0.37**	0.50**	0.73**
Mental health	0.30**	0.32**	0.32**	0.48**	0.73**	0.40**	0.48**	1.00**
Short form of DDRQOL-R (DDRQOL-R-9)
Satisfaction with diet (3 items)	0.31**	0.27**	0.18*	0.40**	0.53 **	0.29**	0.37**	0.47 **
Burden of diet therapy (3 items)	0.26**	0.22**	0.16*	0.39**	0.43**	0.12	0.27**	0.40 **
Perceived merits of diet therapy (3 items)	0.08	0.03	0.08	−0.03	0.09	0.11	−0.04	0.03

Bold indicates an expected relationship

^* p < 0.05, ^** p < 0.01