Table 2.

Coefficients of the independent predictor variables for HRQOL scores in peritoneal dialysis patients

Independent variable	Dependent variable
	Component summary score			KDCS subscale			Health utility
	PCS	MCS	KDCS	Symptoms	Effects	Burden	EQ-5D
Young (45 years)	Ref.
Middle-aged (45–60 years)	−5.31**	0.58	−2.44	−6.30	−2.46	1.44	−0.088
Old (>60 years)	−2.81	2.69	4.58	0.95	6.97	5.83	−0.022
Male	Ref.
Female	0.61	−1.01	1.97	0.33	3.39	2.18	−0.003
Chinese	Ref.
Malay/Indians/others	−2.56	0.77	−1.42	−0.81	−4.11	0.65	−0.039
Low education (no/primary/secondary)	Ref.
High education (tertiary/above)	−1.10	2.31	−1.49	−2.36	−4.42	2.32	0.007
Non-married	Ref.
Married	1.23	−1.61	−2.90	−1.38	−3.81	−3.50	0.002
Housing type, public residence	Ref.
Housing type, private residence	0.80	0.08	2.13	2.89	−3.01	9.10	0.006
Low CCI (<5)	Ref.
High CCI (≥5)	−0.95	−1.32	−5.75	−2.28	−4.59	−10.4	−0.029
Low albumin level (<37 g/l)	Ref.
High albumin level (≥37 g/l)	5.75**	4.90*	6.38	7.52	10.7*	0.90	0.146**
Low hemoglobin level (<11 g/dl)	Ref.
High hemoglobin level (≥11 g/dl)	1.70	0.62	2.47	2.33	1.97	3.12	0.037
CAPD	Ref.
APD	2.81*	−0.56	2.63	6.90**	4.78	−3.78	0.039
Dependency status, assisted	Ref.
Dependency status, self-care	5.12***	−0.20	2.79	4.50	6.03	−2.16	0.085**
Short dialysis vintage (<3.5 years)	Ref.
Long dialysis vintage (≥3.5 years)	0.02	0.42	−0.97	−1.66	0.31	−1.55	0.011
Low dialysis adequacy (<2.0/week)	Ref.
High dialysis adequacy (≥2.0/week)	−1.63	−2.74	−1.69	−0.85	−2.53	−1.69	−0.065*
Total R 2	0.17	0.05	0.06	0.09	0.08	0.04	0.15

All p values for a given independent variable are controlled for all other independent variables in the model

APD automated peritoneal dialysis, CAPD continuous ambulatory peritoneal dialysis, CCI Charlson Comorbidity Index, EQ-5D EuroQol 5-dimension, HRQOL health-related quality of life, KDCS kidney disease component summary, MCS mental component summary, PCS physical component summary

* p < 0.05, ** p < 0.01, *** p < 0.001