Table 2

Correlations between the SAQLI and related questionnaires

	SAQLI domains
	Symptoms	Daily life activities	Social interactions	Emotions
¹Pearson's coefficient of correlation. ²Correlations all statistically significant (p<0.001). ³Negative coefficients of correlation obtained with the Epworth scale, the SCL-90, and the Beck Depression Inventory are from the higher scores on these questionnaires indicating worse quality of life, as opposed to the SAQLI and SF-36.
Epworth scale	−0.64^{1 2 3}

SF-36
Physical functioning	0.46	0.64
Vitality	0.72	0.82
Role - physical		0.72
Social functioning			0.72
Role - emotions				0.55

SCL-90
Interpersonal			−0.65³
Depression				−0.83³

Beck Depression Inventory				−0.66³