Univariate analysis for DHEA and GH: Levels of DHEA (mean difference: 30.2 (SE = 9.0)), and GH (mean difference: 0.42 (SE = 0.16)) were significantly lower in the COPD group compared with those in the controls (p < 0.001 Student’s t-test) (Table 2, Figure 2 and Figure 3). The gene discussed is GH1; the disease is chronic obstructive pulmonary disease.