Skip to main content

Table 3 Association of patient and disease characteristics with short form-36 component summary scores in simple linear regression

From: Association of the lupus low disease activity state (LLDAS) with health-related quality of life in a multinational prospective study

Variable

Physical component summary

Mental component summary

Coeff*

p

95% CI

Coeff*

p

95% CI

Country

 Australia

reference

-

-

1.06

0.01

1.01–1.10

 China

1.14

<0.001

1.10–1.18

reference

  

 Indonesia

1.11

<0.001

1.06–1.16

1.06

0.04

1.01–1.12

 Philippines

1.23

<0.001

1.18–1.28

1.20

<0.001

1.14–1.26

 Singapore

1.14

<0.001

1.10–1.18

1.13

<0.001

1.08–1.18

 Taiwan

1.14

<0.001

1.11–1.18

1.05

0.01

1.01–1.10

 Thailand

1.12

<0.001

1.09–1.16

1.04

0.10

0.99–1.08

Ethnicity

 Caucasian

reference

-

-

reference

-

-

 Asian

1.22

<0.001

1.18–1.26

1.03

0.19

0.99–1.08

Gender

 Female

reference

-

-

reference

-

-

 Male

1.02

0.42

0.98–1.06

0.99

0.95

0.95–1.05

Education

 Primary

reference

-

-

reference

-

-

 Secondary

1.05

0.001

1.02–1.08

1.01

0.47

0.98–1.05

 Tertiary

1.09

<0.001

1.06–1.13

1.06

0.002

1.02–1.09

Age at diagnosis (years)

0.997

<0.001

0.996–0.998

1.00

0.76

0.998–1.001

Disease duration (years)

0.997

<0.001

0.996–0.999

1.00

0.07

0.999–1.003

SLEDAI score

0.994

<0.001

0.992–0.996

0.997

0.03

0.994–0.999

Current organ activity

 CNS

0.82

0.003

0.73–0.93

0.93

0.32

0.79–1.08

 Renal

0.98

0.12

0.96–1.00

0.99

0.37

0.96–1.02

 MSK

0.89

<0.001

0.86–0.93

0.95

0.03

0.91–0.99

 Vasculitis

0.90

0.02

0.83–0.98

0.96

0.46

0.88–1.06

 Cutaneous

0.97

0.02

0.94–0.99

0.94

0.001

0.92–0.98

 Serositis

0.86

0.01

0.77–0.96

1.04

0.58

0.91–1.18

PGA (0–3)

0.94

<0.001

0.93–0.96

0.94

<0.001

0.93–0.96

Mild flare

0.95

0.002

0.92–0.98

0.98

0.25

0.94–1.02

Severe flare

0.89

<0.001

0.86–0.93

0.95

0.03

0.90–0.99

Prednisolone dose (mg)

0.998

<0.001

0.997–0.999

0.998

<0.001

0.997–0.999

LLDAS

1.04

<0.001

1.02–1.06

1.06

<0.001

1.04–1.09

SLICC-DI score

0.95

<0.001

0.94–0.96

0.99

0.43

0.99–1.01

  1. *Coefficient (Coeff) is based on the log-linear model and back-transformed using the exponential function. This represents (coeff-1)*100% increase/decrease in physical component summary or mental component summary scores for change in category (categorical variables), or (coeff-1)*100% change per one unit (continuous variables). Abbreviations: SLEDAI systemic lupus erythematosus disease activity index, MSK musculoskeletal, PGA physician global assessment, LLDAS lupus low disease activity state, SLICC Systemic Lupus International Collaborating Clinics, DI damage index, CNS central nervous system