Bivariate correlation of several nailfold capillaroscopy characteristics between the HAVS and NVEC groups
| Number of capillaries/mm | Haemorrhages | Enlarged capillaries | Avascular areas | VWF | |
|---|---|---|---|---|---|
| Number of capillaries/mm | 1 | r=−0.458** | r=−0.157 | r=−0.568** | r=−0.601** |
| Haemorrhages | – | 1 | r=0.178 | r=0.416** | r=0.607** |
| Enlarged capillaries | – | – | 1 | r=−0.004 | r=0.348* |
| Avascular areas | – | – | – | 1 | r=0.486** |
| VWF | – | – | – | – | 1 |
N=74.
*p<0.05, **p<0.001.
HAVS, hand-arm vibration syndrome; NVEC, non-vibration-exposed controls; VWF, vibration-induced white finger.