Comparison of clinical and radiologic treatment outcomes of Kienböck’s disease

Table 2 Pre- and post-treatment range of motion (ROM) for all treatment groups

	Pre-E/F		Post-E/F		Pre-R/U		Post-R/U		Pre-P/S		Post-P/S
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
STT (n = 27)	91°	4.5	83°	16.4	42°	11.6	33°	9.9	167°	13.5	155°	20.2
RSO (n = 14)	73°	8.0	93°	42.5	37°	10.1	43°	19.8	166°	10.4	149°	17.2
VBG (n = 4)	96°	12.5	70°	55.7	51°	26.6	30°	27.8	165°	19.1	150°	0
RSO and VBG (n = 2)	115°	15.0	95°	7.1	55°	7.1	48°	10.6	170°	14.1	145°	7.1
Post-treatment differences
RSO vs. STT (P value)			0.38^a				0.09^a				0.48^a
Estimated clinically relevant difference			30°^b				20°^b				20°
Sample size calculation			66				34				36

STT scaphotrapeziotrapezoid arthrodesis, RSO radial shortening osteotomy, VBG vascularized bone graft, SD standard deviation
ROM was missing in 4/57 cases. The t test was used for statistical analysis. Sample size per group calculation was based on α = 0.05, power = 80 %, a two-sided t test for independent groups, and a clinically relevant difference of 10 % in the highest score
^aWilcoxon test
^bEstimation based on functional ranges of motion of the wrist [40]

ISSN: 1749-799X