Table 5. Data regarding of level of serum cortisol in different level of depression.

	Depression levels
	Normal	Mild	Moderate	Severe	Very severe
Number	89	71	67	7	6
Mean serum cortisol level (nmol/L), Mean±SD	227.08±84.72	363.55±75.32	463.16±93.78	513.18±123.12	663.06±40.0
P value			0.001