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Table 3 Descriptive factors of the observed capillaries (non-VWF vs. VWF)

From: Nailfold capillary microscopy for evaluating hand-arm vibration syndrome

Microscopic findings Non-VWF (n = 44) VWF (n = 18) pvalue* Adjustedpvalue
  Afferent 1 15.14 ± 3.70 15.61 ± 4.02 0.663 0.591
  Afferent 2 14.59 ± 3.59 14.39 ± 4.01 0.847 0.819
Afferent Afferent 3 13.65 ± 3.99 13.67 ± 2.75 0.990 0.625
  Afferent mean 14.46 ± 3.09 14.55 ± 3.00 0.915 0.952
  Afferent maximum 16.77 ± 3.80 16.80 ± 4.12 0.977 0.973
  Top 1 17.41 ± 4.86 19.60 ± 5.14 0.119 0.891
  Top 2 17.42 ± 4.28 17.58 ± 3.31 0.888 0.992
Top Top 3 16.25 ± 4.76 16.36 ± 4.71 0.934 0.909
  Top mean 17.03 ± 3.75 17.85 ± 3.32 0.424 0.982
  Top maximum 19.71 ± 5.07 21.00 ± 4.84 0.363 0.875
  Venous 1 20.43 ± 6.73 19.63 ± 4.94 0.650 0.478
  Venous 2 18.14 ± 3.95 17.40 ± 5.21 0.545 0.505
Venous Venous 3 17.65 ± 5.67 17.51 ± 4.16 0.924 0.383
  Venous mean 18.74 ± 4.60 18.18 ± 4.29 0.659 0.379
  Venous maximum 21.81 ± 6.42 20.59 ± 4.85 0.471 0.293
  Total width 1 52.48 ± 13.26 50.41 ± 12.02 0.569 0.623
  Total width 2 48.11 ± 9.64 49.89 ± 13.67 0.621 0.308
Total width Total width 3 47.65 ± 13.42 45.39 ± 8.09 0.419 0.356
  Total width mean 49.41 ± 10.37 48.56 ± 9.46 0.764 0.345
  Total width maximum 56.28 ± 13.21 55.69 ± 12.36 0.872 0.355
  Length 1 341.32 ± 122.35 392.45 ± 149.93 0.167 0.996
  Length 2 321.50 ± 129.00 384.07 ± 176.19 0.126 0.256
Length Length 3 334.75 ± 129.55 343.87 ± 173.84 0.821 0.116
  Length mean 332.52 ± 112.75 373.46 ± 152.51 0.248 0.848
  Length maximum 389.61 ± 138.84 445.69 ± 151.15 0.164 0.587
  1. Unit: μm.
  2. *t test.
  3. Adjusted for age, smoking status, and diseases using analysis of covariance.
  4. Abbreviations: Non-VWF non- vibration-induced white finger, VWF vibration-induced white finger.