Severe sleep disturbance is associated with executive function impairment in patients with first-episode, treatment-naïve major depressive disorders

Table 3 Cognitive impairment in patients before matching

Cognitive domains	G1 (n, %)	G2 (n, %)	Chi-square	OR	95%CI	P	q
Executive function	39 (32.2)	36 (20.6)	5.141	1.836	1.082, 3.116	0.024	0.036
Executive shifting	67 (55.4)	70 (40.0)	6.799	1.816	1.164, 2.975	0.009	0.027
Executive inhibition	43 (35.5)	41 (23.4)	5.160	1.802	1.081, 3.003	0.024	0.036

G1 Group 1, patients with severe sleep disturbance (HAMD-17 sleep score > 4), G2 Group 2, patients without severe sleep disturbance (HAMD-17 sleep score ≤ 4)

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