Estimated DC minus VS group differences in mean BMD change through follow-up were 1.4 % [ hip ; 95 % confidence interval ( CI ) 0.6-2 .3 ; P = 0.002 ] , 1.3 % ( spine DXA ; 95 % CI 0.1-2 .4 , P = 0.03 ) , and 3.0 % ( spine qCT ; 95 % CI 0.8-5 .2 , P = 0.007 ) .
