At 6 months , spine BMD increased significantly more with TPT ( posteroanterior spine , 6.0 % 1.4 % ; lateral spine , 10.5 % 2.5 % ) compared with placebo ( posteroanterior spine , 0.2 % 0.7 % , P < .01 ; lateral spine , -0.6 % 1.0 % ; P < .01 ) .