Epidemiology of Kienb  ck's Disease in Middle-aged and Elderly Japanese XXXX .

@entity1 @entity195
UNASSIGNED: Little research has been done on the prevalence of @entity195 , and there is no consensus on the relationship between @entity195 and negative ulnar variance. The goal of this cross-sectional study was to determine the prevalence of @entity195 in middle-aged and elderly Japanese @entity1 and to clarify the relationship between @entity195 and negative ulnar variance. The authors analyzed plain radiographs of both hands in @entity1 40 years and older residing in the community to investigate the prevalence of @entity195 and the relationship between @entity195 and negative ulnar variance. @entity195 was seen in 7 of the 572 @entity1 . In the group with @entity195 , ulnar variance did not differ significantly between affected (0.3 mm; SD, 1.5) and unaffected (0.3 mm; SD, 1.0; P=.285) sides. No significant difference was seen in ulnar variance values between the affected side in the group with @entity195 and the normal group (P=.118). The number or proportion of @entity1 with negative ulnar variance did not differ significantly between the affected side in the group with @entity195 (3 of 7) and the unaffected side in the group with @entity195 (1 of 7; P=.237) and between the affected side in the group with @entity195 and the normal group (111 of 504; P=.189) by chi-square test. The prevalence of @entity195 was 1.2% in middle-aged and elderly Japanese @entity1 . Negative ulnar variance is not a contributing factor to @entity195 . [Orthopedics. 2015; 38(1):e14-e18.].
