IGF1 and hypopituitarism: However, the results of Annamaria, who contradicted our study, divided 101 adult patients with hypopituitarism into very severe GHD, severe GHD, partial GHD, and non-GHD groups according to the peak GH on a GH provocation test and found that in the lumbar spine, the T-scores for BMD correlated with the degree of GHD deficiency and that both the peak GH and serum IGF-1 correlated significantly with the T-scores [29].