Variable | Factor |
---|
 | 1 | 2 | 3 | 4 |
---|
TNF-α |  | 0.751 |  |  |
IL-6 | Â | Â | 0.913 | Â |
MCP-1 | Â | 0.912 | Â | Â |
BN/GRP | -0.436 | Â | 0.623 | 0.327 |
SP | 0.409 | 0.33 | 0.361 | 0.671 |
VIP | 0.784 | Â | Â | Â |
CGRP | 0.715 | Â | Â | -0.472 |
NPY | 0.893 | Â | Â | Â |
ESR | Â | Â | Â | 0.71 |
- Principal-component analysis for cytokines and neuropeptides in synovial fluid from 23 patients with long-standing RA, and for the ESR. BN/GRP, bombesin/gastrin-releasing peptide; CGRP, calcitonin-gene-related peptide; ESR, erythrocyte sedimentation rate; MCP, monocyte chemoattractant protein-1; NPY, neuropeptide Y; RA, rheumatoid arthritis; SP, substance P; TNF, tumour necrosis factor; VIP, vasoactive intestinal peptide.