Is there a dysfunction in the visual system of depressed patients?

Table 2 Comparison between melancholic and atypical patients and controls (ANCOVA with age as covariate; significant are p-values below 0.005).

	mean	s.d.	mean	s.d.	p	p	p	p	p	p
	Atypical features N = 14		Melancholic features N = 16		A/M ANCOVA	A/M Post-hoc	A/C ANCOVA	A/C Post-hoc	M/C ANCOVA	M/C Post-hoc
Age	37.00	7.79	47.00	13.03	0.016		0.575		0.007
Age of Onset	27.21	8.74	34.68	12.83	0.070		-		-
Number of previous episodes	1.21	1.37	1.21	1.69	0.995		-		-
GAF	60.36	10.65	41.16	12.10	*0.000*		-		-
Number of PD diagnosed	0.50	0.65	0.16	0.37	0.066		-		-
Number of PD criteria fulfilled	3.29	4.14	2.26	3.96	0.477		-		-
Number of stressful life events	3.64	2.27	1.21	1.44	*0.001*		-		-
HDRS-17	23.14	3.82	28.53	6.54	0.010		-		-
EOG					0.510		*0.004*		*0.001*
Left dark trough	187.86	47.31	181.84	49.22				0.006		*0.001*
Left light peak	488.50	132.98	443.16	124.36				0.015		*0.001*
Right dark trough	175.57	48.39	191.74	54.57				*0.001*		*0.002*
Right light peak	421.14	133.78	422.21	85.18				*0.001*		*0.000*
Left Arden ratio	262.95	47.09	246.03	40.03				0.256		0.790
Right Arden ratio	242.73	44.30	230.94	56.65				0.579		0.876
Flash-ERG Photopic Conditions					0.175		0.714		0.142
Lr a wave, ampl	4.08	1.97	4.70	1.89
Lr a wave, lat	13.38	1.42	14.37	0.75
Lr b wave, ampl	7.44	2.19	8.80	1.50
Lr b wave, lat	30.00	3.42	33.00	1.86
Rr a wave, ampl	4.12	1.35	4.67	1.84
Rr a wave, lat	13.31	1.30	14.14	1.63
Rr b wave, ampl	6.73	2.64	8.51	1.95
Rr b wave, lat	30.12	3.42	33.19	2.23

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