Table 3.

Risk factors for seroconversion in students (n = 511) and staff (n = 358) between Round 2 (December 2020) and Round 3(March 2021).

	Students (clustering p = 1.0)		Staff (clustering p = 0.068)
	adjusted OR (95% CI)	p-value	adjusted OR (95% CI)	p-value
Sex
Male	1.46 (0.78–2.74)	0.24	1.37 (0.66–2.86)	0.40
Female	1		1
Age cat
Lower school	1	0.97
GCSEs	1.04 (0.51–2.13)
A-Levels/College	1.11 (0.52–2.38)
19–29			0.42 (0.11–1.67)	0.79
30–39			1
40–49			0.69 (0.26–1.81)
50–59			0.76 (0.31–1.88)
60+			0.70 (0.17–2.90)
Ethnicity
White	1	0.71	1	0.083
Black	2.33 (0.63–8.69)		–
Asian	1.30 (0.61–2.75)		2.95 (1.11–7.84)
Mixed	1.06 (0.33–3.38)		0.70 (0.08–6.16)
Other	0.72 (0.15–3.50)		–
School area
Derbyshire	1	0.0060	1	0.69
East London	3.60 (1.59–8.14)		1.10 (0.32–3.76)
Greater Manchester	1.21 (0.29–5.06)		0.29 (0.03–3.15)
Hertfordshire	0.96 (0.23–3.99)		0.92 (0.13–6.69)
West London	1.49 (0.54–4.12)		0.35 (0.07–1.72)
Birmingham	0.66 (0.18–2.36)		0.73 (0.23–2.33)
School attendance during lockdown
Not attending school	1	0.032
Attending school part time	2.52 (0.93–6.81)		1	0.066
Attending school full time	2.27 (1.06–4.86)		2.02 (0.95–4.28)