Table 5.

Multivariate analyses of variations in health utility from EQ-5D-5L (coefficients)

Independent variable	Items of EQ-5D-5L					EQ-5D-5L	EQ-VAS
	Mobility	Self-Care	Usual activities	Pain	Depression
Age (in a unit of years)	0.03
Married (vs. others)	−0.89*	− 0.87*	− 0.73			0.06
Educational attainment
Illiteracy and primary school	Ref.	Ref.	Ref.
Junior high school	0.07	−0.06	−0.45
Senior high school	−0.32	0.02	−0.32
College or above	0.40	−0.46	−0.52
Urban (vs. Rural)	−0.53		−1.58*				0.67
Medical insurance
New rural cooperative scheme and others	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
Urban employees	−0.52	−0.30	1.08	− 0.43*	−0.46*	0.05*	−0.16
Urban residents	−0.91	−0.51	− 0.79*	−0.72*	− 0.77*	0.09*	0.62*
Occupation
Unemployed	Ref.	Ref.
Retired	0.59	0.23
Blue-collar	0.47	0.37
White-collar	−0.11	−0.42
Household income
< 30,000 RMB			Ref.
30,000–80,000 RMB			−0.31
> 80,000RMB			−0.01
Inpatients (vs. outpatients)	2.05***	1.41**	1.53***	1.30***	0.95**	−0.22***	−0.47
TNM stage
0 and I	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
II	0.63	0.23	0.70*	0.19	0.11	−0.03	0.09
III	0.45	0.72	0.90*	0.31	−0.33	−0.03	− 0.14
IV	1.37*	0.60	1.20*	1.10*	0.18	−0.10	−0.12
Surgery
No surgery	Ref.						Ref.
Breast-conserving surgery	0.45						0.67
Modified radical surgery	0.86						0.24
Radiotherapy (yes vs. no)	0.00					0.01
Targeted therapy (yes vs. no)							1.04**
Endocrine therapy (yes vs. no)		−0.03	0.44			−0.01
Chemotherapy (yes vs. no)		− 0.56	−0.77*
Menopause (yes vs. no)		−0.21
State
P	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
S	0.22	−0.53	−0.39	0.31	− 0.11	0.00	0.35
R	0.44	−0.04	0.32	0.24	0.56	−0.07	−1.12*
M	0.30	0.44	0.27	1.21**	1.17**	−0.11*	− 0.79

^***p < .001; ^**p < .01; ^*p < .05

Variables without coefficients did not make a statistically significant difference in univariate analyses (results not presented here); therefore, they were not introduced into multivariate analyses