Table 1

Characteristics of school and daycare staff participants, March–October 2021

		Seroprevalence sample n (%)	Mental health sample n (%)
Dates of assessments		April–October, 2021	March–July, 2021
Total		362	389
School level	Daycare	109 (30.1)	113 (29.0)
	Elementary school	130 (35.9)	142 (36.5)
	High school	123 (34.0)	134 (34.4)
Age group	<40 years	130 (35.9)	142 (36.5)
	40–50 years	105 (29.0)	116 (29.8)
	50+ years	126 (34.5)	128 (32.9)
	Missing	2 (0.55)	3 (0.77)
Sex at birth	Male	40 (11.0)	41 (10.5)
	Female	322 (89.0)	348 (89.5)
Ethnic or racial minority	White	346 (95.6)	371 (95.4)
	Other	14 (3.9)	16 (4.1)
	Missing	2 (0.55)	2 (0.51)
Number classes taught	1–2	126 (34.8)	128 (32.9)
	3–4	120 (33.1)	127 (32.6)
	Not applicable	116 (32.0)	134 (34.4)
Bedroom density*	<1 persons per bedroom	110 (30.4)	117 (30.1)
	≥1 persons per bedroom	252 (69.6)	272 (69.9)
Household income	<100 000$ CAD	158 (43.6)	168 (43.2)
	≥100 000$ CAD	161 (44.5)	173 (44.5)
	Missing	43 (11.9)	48 (12.3)
Education level	No university	112 (30.9)	122 (31.4)
	University degree	248 (68.5)	265 (68.1)
	Missing	2 (0.55)	2 (0.51)
Vaccinated with at least one dose	No	105 (29.0)	167 (42.3)
	Yes	257 (71.0)	222 (57.1)
School area	HOMA	38 (10.5)	43 (11.1)
	Montreal North	176 (48.6)	194 (49.9)
	Plateau Mont Royal	53 (14.6)	55 (14.1)
	West Island	95 (26.2)	97 (24.9)
Contact with students that do not usually physically distance	No	91 (25.1)	101 (26.0)
	Yes	271 (74.9)	282 (72.5)
	Not applicable	0 (0.00)	6 (1.54)
Contact with students that do not usually wear a mask	No	238 (65.7)	254 (65.3)
	Yes	124 (34.3)	129 (33.2)
	Not applicable	0 (0.00)	6 (1.54)