Table 2.

Characterization and association of sociodemographic variables between waves of occurrence, according to hospitalizations for COVID 19.

		Waves						P-values*
		1		2		3
		n	%	n	%	n	%
Age group	Up to 59 y.o	1333	47.85	812	44.59	2579	58.48	< 0.001
	60 to 79 y.o	1034	37.11	712	39.10	1434	32.52
	> 80 y.o	419	15.04	297	16.31	397	9.00
Education**	Illiterate	107	6.83	62	5.61	107	4.72	< 0.001
	Elementary	625	39.89	417	37.70	976	43.03
	High school	513	32.74	393	35.53	831	36.64
	Higher education	322	20.55	234	21.16	354	15.61
Sex	Female	1263	45.33	841	46.18	2004	45.44	0.832
	Male	1523	54.67	980	53.82	2406	54.56
Pregnant**	No	1233	98.33	813	97.02	1981	98.56	0.018
	Yes	21	1.67	25	2.98	29	1.44
Race/color**	Non-White	1337	60.28	784	53.52	1996	57.49	< 0.001
	White	881	39.72	681	46.48	1476	42.51
Person with disability**	No	2571	96.84	1783	97.91	4338	98.37	< 0.001
	Yes	84	3.16	38	2.09	72	1.63
Homeless**	No	2608	99.39	1811	99.45	4390	99.55	0.665
	Yes	16	0.61	10	0.55	20	0.45
Zone**	Urban	2521	94.07	1588	90.95	3732	88.94	< 0.001
	Rural	158	5.90	155	8.88	456	10.87
	Periurban	1	0.04	3	0.17	8	0.19
Health professionals**	No	2465	92.84	1641	96.13	3929	97.93	< 0.001
	Yes	190	7.16	66	3.87	83	2.07
Work-related infection**	No	1651	94.40	1524	96.95	3610	98.55	< 0.001
	Yes	98	5.60	48	3.05	53	1.45

(*) Pearson's chi-square test; significant if p ≤ 0.050.

(**) The remainder of the sample was within the “ignored” and “not applicable” categories.

Significant values are in bold.