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Table 3 Associations between SLEDAI-2 K scores or serum IFN-α concentrations and plasma NfL concentrations

From: The impact of disease activity and interferon-α on the nervous system in systemic lupus erythematosus

SLEDAI-2 K or IFN-α variables

Estimated fixed effect

SE

T-value

p-value

SLEDAI-2 K total

0.015

0.003

5.0

1.5*10− 6

SLEDAI-2 K ≥ 10 (n = 28) versus < 10 (n = 171)

0.24

0.04

5.6

7.2*10− 8

SLEDAI-2 K ≥ 4 (n = 80) versus < 4 (n = 119)

0.095

0.03

2.9

0.0038

Anti-dsDNA and/or low complement only (n = 46) versus SLEDAI-2 K = 0 (n = 66)

6.3*10− 3

0.05

0.13

0.90

SLEDAI-2 K arthritis (n = 18 versus n = 181)

-0.021

0.06

-0.35

0.72

SLEDAI-2 K renal involvement (n = 27 versus n = 165)

0.13

0.05

2.6

0.010

SLEDAI-2 K skin or mucosal involvement (n = 43 versus n = 156)

0.057

0.04

1.4

0.17

LogIFN-α serum concentration

0.047

0.03

1.8

0.081

  1. Abbreviations: SLEDAI-2 K: SLE Disease Activity Index 2000. IFN: interferon. Anti-dsDNA: anti-double stranded DNA antibodies. DMARD: disease-modifying antirheumatic drug. SE: Standard error