Importance of remission and residual somatic symptoms in health-related quality of life among outpatients with major depressive disorder: a cross-sectional study

Table 4 Results of stepwise multiple regression analysis: Association between depression and somatic symptoms subscales and the quality of life

Variable	New MDD (N = 287)		Remitted MDD (N = 235)		Non-remitted MDD (N = 289)		Total (N = 811)
Variable	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value
DS score	−0.012	<0.0001	−0.010	<0.0001	-	-	−0.008	<0.0001
SS score	−0.006	0.0173	−0.004	0.0340	−0.016	<0.0001	−0.009	<0.0001
Bech score	−0.012	0.0012	-	-	-	-	-	-
Gibbons score	-	-	-	-	−0.017	<0.0001	−0.008	<0.0001

MDD = major depressive disorder; DS = depression subscale of the depression and somatic symptoms scale (DSSS); SS = somatic subscale of the DSSS.
Stepwise regression analysis using the full set of variables of the DSSS adjusted by age and sex:
Model 1: QoL (EQ-5D index score|New) = a + b1(DS score) + b2(SS score) + b3(Bech) + b4(Age) + b5(Sex).
Model 2: QoL (EQ-5D index score|Remitted) = a + b1(DS score) + b2(SS score) + b3(Age) + b4(Sex).
Model 3: QoL (EQ-5D index score|Non-remitted) = a + b1(SS score) + b2(Gibbons) + b3(Age) + b4(Sex).

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