Radiographic Outcomes of Percutaneous Pinning for Displaced Extra-Articular Fractures of the Distal Radius: A Time Course Study

Table 4

Group comparison of time-dependent change of radiographic parameters after fracture fixation.

Variables	Group 1	Group 2	𝑃 values^†
	(𝑛=25)	(𝑛=60)
RH^a (mm) (mean, SD)
Δ^e Post-M1§	0.72 (0.96)	1.10 (1.63)	0.292
Δ M1-M2	0.24 (0.77)	0.28 (0.69)	0.882
Δ M2-M3	0.04 (0.52)	0.08 (0.46)	0.723
RI^b (degree) (mean, SD)
Δ Post-M1	0.98 (2.00)	1.60 (3.02)	0.354
Δ M1-M2	0.17 (1.23)	0.24 (1.10)	0.798
Δ M2-M3	−0.04 (0.79)	0.07 (0.85)	0.557
RT^c (degree) (mean, SD)
Δ Post-M1	3.06 (6.51)	6.43 (6.02)	0.028*
Δ M1-M2	0.63 (1.89)	1.75 (2.57)	0.047*
Δ M2-M3	0.09 (1.34)	0.21 (1.24)	0.547
UV^d (mm) (mean, SD)
Δ Post-M1	−0.98 (1.25)	−1.36 (1.23)	0.237
Δ M1-M2	−0.55 (0.76)	−0.35 (0.65)	0.227
Δ M2-M3	−0.34 (0.78)	−0.14 (0.47)	0.144

†Wilcoxon rank sum test, unless otherwise stated.
*The difference is significant (𝑃<0.05).
^aRH: radial height; ^bRI: radial inclination; ^cRT: radial tilt; ^dUV: ulnar variance; ^eΔ𝑌₂−𝑌₁: change of 𝑌.
§M𝑥: 𝑥 months after the index surgery.