Table 2 Univariate Cox regression analysis for ECG-4 and ECG-5

Non-Caucasian

1.91 (1.27–2.86)

0.002

1.63 (1.11–2.37)

0.012

Gender (male)

1.13 (0.62–2.07)

0.68

1.19 (0.68–2.09)

0.53

Age

1.03 (1.007–1.05)

0.01

1.02 (1.004–1.05)

0.02

Disease duration

1.06 (1.03–1.09)

0.0007

1.05 (1.014–1.09)

0.006

Hypertension within 5 years prior to ECG

0.88 (0.49–1.57)

0.67

0.91 (0.52–1.58)

0.73

Hyperlipidemia on statins ever before ECG

0.59 (0.30–1.13)

0.11

0.54 (0.29–1.01)

0.05

Ever smoked before ECG

0.72 (0.39–1.35)

0.31

0.75 (0.42–1.35)

0.34

Diabetes 3 years before ECG

0.75 (0.27–2.04)

0.09

0.75 (0.27–2.048)

0.57

SLEDAI-2 K

1.05 (1.012–1.013)

0.01

1.05 (1.01–1.09)

0.008

AMS 2 years prior to ECG

1.08 (1.02–1.13)

0.005

1.08 (1.03–1.13)

0.003

SDI

1.23 (1.07–1.41)

0.003

1.21 (1.06–1.39)

0.006

Cumulative glucocorticoids

1.007 (1.001–1.01)

0.02

1.007 (1.001.013)

0.02

Treated with antimalarials

2.27 (1.12–4.59)

0.02

2.11 (1.11–4.04)

0.02

Treated with immunosuppressives

2.15 (1.21–3.83)

0.009

2.06 (1.19–3.55)

0.009

Coombs

1.19 (0.81–1.76)

0.37

1.19 (0.83–1.73)

0.33

Anti-Jo1

0.65 (0.26–1.63)

0.36

0.71 (0.30–1.64)

0.41

Anti-La

0.79 (0.47–1.34)

0.39

0.8 (0.49–1.31)

0.38

Anti-RNP

1.18 (0.791.74)

0.41

1.24 (0.86–1.79)

0.24

Anti-Ro

0.81 (0.56–1.18)

0.27

0.79 (0.55–1.14)

0.21

Anti-Scl70

0.49 (0.15–1.59)

0.24

0.45 (0.14–1.44)

0.19

Anti-Smith

1.43 (0.89–2.27)

0.13

1.44 (0.93–2.22)

0.11

ANCA

0.63 (0.32–1.21)

0.17

0.63 (0.34–1.18)

0.15

Anti-ds DNA

1.52 (1.02–2.29)

0.041

1.48 (1.01–2.16)

0.04

ANA

0.86 (0.38–1.97)

0.72

0.74 (0.36–1.53)

0.42

APLA

0.85 (0.53–1.35)

0.48

0.73 (0.49–1.23)

0.29