Table 3.

Fully adjusted multivariable logistic regression results (M1 staff and pupils; M2 stratified by staff; and M3 stratified by pupils). Adjustments for age, sex, residential settlement type, number of pupils and staff within the linked school, and number of people within linked household are included in the models, ORs of the fully adjusted covariates can be found in online supplemental table S2). ORs are calculated per individual case of known exposure

Exposure variable (within last 14 days)	M1: staff and pupil outcomes (n=83004)	M2: staff outcomes (n=13543)	M3: pupil outcomes (n=69461)
Count of cases within own household	11.81*** (11.02–12.15)	39.86*** (35.01–45.38)	9.39*** (8.94–9.88)
Count of staff member cases within the linked school	0.93*** (0.89–0.97)	0.92’ (0.85–1.00)	0.97 (0.91–1.01)
M1 and M2: count of pupil cases within the linked school	0.97*** (0.95–0.98)	0.98 (0.93–1.02)
M3: count of non-year group pupil cases within the linked school			0.92*** (0.89–0.94)
Count of pupil cases in the linked school within the same year group	–	–	1.12*** (1.08–1.15)
Count of cases in staff member’s homes linked to the school	1.11*** (1.07–1.15)	1.09** (1.02–1.17)	1.17*** (1.12–1.22)
Count of cases in pupils' homes linked to the school	1.07*** (1.06–1.09)	1.04* (1.01–1.07)	1.08*** (1.06–1.10)

Significant codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '’' 0.1 ' ' 1.