Testosterone therapy did not improve insulin resistance ( mean adjusted difference -LSB- MAD -RSB- for HOMA-IR compared with placebo -@ -LSB- @ % CI -@ to @ ; P = @ -RSB- ) or glycemic control ( MAD HbA@c @ % -LSB- @-@ @ -RSB- ; P = @ ) , despite a decrease in fat mass ( MAD -@ kg -LSB- -@ to -@ -RSB- ; P < @ ) and an increase in lean mass ( MAD @ kg -LSB- @-@ @ -RSB- ; P < @ ) .