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Table 3 Differences in radiographic parameters immediately after surgery and at 6-month follow-up

From: Evaluating the necessity of bone augmentation for distal radius fracture fixed with a volar locking plate: a retrospective study

 Non-augmentation group, GP1 (n = 88)Augmentation group, GP2 (n = 17)p-value†p-value‡
After surgeryAt 6 monthsp-valueAfter surgeryAt 6 monthsp-value
For all patients with distal radius fracture
 *X/Y3.56(3.42, 3.74)3.46(3.34, 3.61)< 0.001**3.54(3.36, 3.61)3.42(3.30, 3.53)0.001**0.3990.289
 Volar tilting11.00(9.00, 13.00)11.00(8.00, 13.00)0.36611.00(7.00, 12.50)10.00(7.00, 13.00)0.7490.2400.281
 Radial inclination22.00(19.00, 24.00)22.00(20.00, 24.00)0.17122.00(19.0, 24.00)21.00(19.50, 22.50)0.2330.7300.278
 Radial height/Ra0.57(0.44, 0.66)0.54(0.39, 0.64)< 0.001**0.52(0.43, 0.57)0.45(0.37, 0.57)0.039*0.1710.196
For patients with comminuted fractures
GP1, (n = 38)GP2 (n = 16)
 X/Y3.60(3.48, 3.75)3.54(3.38, 3.64)< 0.001**3.52(3.35, 3.61)3.42(3.29, 3.54)0.001**0.0940.099
 Volar tilting11.00(8.75, 13.00)10.50(8.00, 12.00)0.09811.00(7.25, 12.75)10.00(7.00, 13.00)0.4970.4020.621
 Radial inclination22.00(19.00, 24.25)22.00(20.00, 24.25)0.69721.50(19.00, 23.00)21.00(19.25, 22.00)0.4310.4580.282
 Radial height/R0.59(0.43, 0.65)0.54(0.39, 0.65)0.002**0.52(0.46, 0.57)0.46(0.41, 0.57)0.0630.2150.384
  1. Mann-Whitney U test, median (interquartile range). Wilcoxon signed rank, *p < 0.05, **p < 0.01
  2. †After surgery: non-augmentation vs. augmentation
  3. ‡At 6 months: non-augmentation vs. augmentation
  4. *X was defined as the distance of the tip of the dorsal cortex to the 2nd distal locking screw
  5. Y was defined as the distance from the distal 1st to the distal 2nd locking screw, which should be fixed between the images immediately and at 6 months after surgery. The ratio X/Y for statistical analysis can eliminate magnification error
  6. a R was defined as the distance from the distal 1st locking hole to the distal 2nd locking hole on the anteroposterior (AP) view, which should be fixed between the images immediately and at 6 months after surgery
  7. The ratio Radial Height/R for statistical analysis can eliminate magnification error