Table 4

Factor analysis on sTNFR1 and neuropeptides in serum

Variable

Factor


1

2

3


sTNFR1

0.323

0.827

BN/GRP

0.324

0.778

SP

0.907

VIP

0.934

CGRP

0.63

0.575

NPY

0.925

ESR

0.897


Principal-component analysis for sTNFR1 and five neuropeptides in serum from 21 patients with long-standing RA, and for the ESR. BN/GRP, bombesin/gastrin-releasing peptide; CGRP, calcitonin-gene-related peptide; ESR, erythrocyte sedimentation rate; NPY, neuropeptide Y; RA, rheumatoid arthritis; SP, substance P; sTNFR1, soluble tumour necrosis factor receptor 1; VIP, vasoactive intestinal peptide.

Grimsholm et al. Arthritis Research & Therapy 2005 7:R416-R426   doi:10.1186/ar1503

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