Table 3.

Results of the Poisson models [exp(b) and p-value] evaluating the association between the weekly admissions and trimesters in the four-year period surrounding the COVID-19 lockdown (2019–2022)

	2019–2022 trimesters
	1	2	3	4	5	7	8	9	10	11	12	13	14	15	16
Schizophrenia spectrum disorder
exp(b)	1.26	1.29	1.14	1.09	1.26	1.14	1.14	0.89	0.71	1.00	1.20	1.69	1.31	0.91	0.71
p	0.31	0.26	0.56	0.73	0.31	0.56	0.56	0.62	0.20	1.00	0.43	0.01	0.22	0.71	0.20
Major depression
exp(b)	1	0.78	0.56	0.78	1.22	1.11	0.56	0.67	1.00	1.00	1.11	2.33	1.00	0.67	0.78
p	1	0.62	0.29	0.62	0.66	0.82	0.29	0.44	1.00	1.00	0.82	0.03	1.00	0.44	0.62
Bipolar disorder
exp(b)	0.57	0.43	1.00	0.64	0.71	0.71	0.64	0.64	1.14	0.64	1.43	1.14	2.00	0.64	0.93
p	0.21	0.08	1.00	0.30	0.42	0.42	0.30	0.30	0.72	0.30	0.31	0.72	0.03	0.30	0.85
Alcohol/substance use disorder
exp(b)	1.50	1.50	0.75	0.75	0.25	0.50	1.00	2.25	3.00	2.00	1.50	5.75	3.25	2.50	3.50
p	0.53	0.53	0.71	0.71	0.21	0.42	1.00	0.18	0.06	0.26	0.53	0.001	0.04	0.12	0.03

Notes Trimester 6 was used as a reference level. Bold values indicate statistical significance at the p < 0.05 level