Table 3.

Intercorrelations of socio-demographic and rare disease characteristics and Health-Related Quality of Life outcomes in 1218 participants

	Age	Gender	Duration of symptoms	Years since diagnosis	Number of rare diseases	Race	Income	Fatigue	Pain interference	Anxiety	Depression	Physical function
Gender	.23**
Duration of symptoms	.07*	−.07*
Years since diagnosis	.12**	0.03	.58**
Number of rare diseases	−.08**	−0.05	.10**	.06*
Race	.03	−.09**	.01	.03	.03
Income	.19**	.09**	−.13**	.05	−.06	.09**
Fatigue	−.29**	−.21**	.08**	−.12**	.17**	.01	−.20**
Pain interference	−.08**	−.12**	.15**	.00	.19**	−0.03	−.22**	.53**
Anxiety	−.30**	−.19**	−.01	−.10**	.03	−.04	−.20**	.47**	.38**
Depression	−.25**	−.15**	.01	−.08**	.03	−.03	−.20**	.53**	.40**	.76**
Physical function	−.07*	.00	−.07*	.01	−.12**	.03	.21**	−.45**	−.51**	−.25**	−.34**
Ability to participate in social roles	.05	.11**	−.08**	.08**	−.17**	−0.03	.17**	−.65**	−.54**	−.39**	−.48**	.72**

Race was coded as person of color = 0, white = 1. Gender was coded as female = 0 and male =1

* p < .05, ** p < .01