Confirmed IGG positive
	Enrolment (N = 399)	Month 3 (N = 274)	% Persistence	P-value of persistence	% Decline
(B)
Age
18–32	85	47	55.3	<0.0001	44.7
33–47	139	84	60.4		39.6
48–62	156	125	80.1		19.9
63–77	19	18	94.7		5.3
Gender
Male	121	77	63.6	0.1525	36.4
Female	278	197	70.9		29.1
Occupational role
Frontline	291	198	68	0.6558	32
Non-Frontline	108	76	70.4		29.6
Ethnicity
Asian	81	57	70.4	0.0055	29.6
Black	82	67	81.7		18.3
White	171	102	59.6		40.4
Mixed	13	11	84.6		15.4
Other	51	36	70.6		29.4
Missing	1	1	100		-