Table 1.

Demographic characteristics of the study population.

Groups	Full dose (n = 6,402)								Half dose (n = 16,570)
Study groups by Age	Female	%	Male	%	Missing	%	Total	%	Female	%	Male	%	Missing	%	Total	%
18–29	799	55	587	41	57	4	1,443	22	3,360	49	3,333	49	143	2	6,836	41
30–39	1,172	54	902	42	79	4	2,153	34	2,637	46	2,952	52	137	2	5,726	35
40–49	1,572	56	1,180	42	54	2	2,806	44	1,752	44	2,190	55	66	2	4,008	24
Total	3,543	55	2,669	42	190	3	6,402	100	7,749	47	8,475	51*	346	2	16,570	100
Mean Age	36.8		36.8		34.0		36.7		31.9*		32.8*		31.8		32.3*
Age SD	8.6		8.6		7.9		8.6		8.6		8.6		7.8		8.6

SD, standard deviation; Full dose, ChAdOx1 Full dose group; Half dose, ChAdOx1 Half dose group. *p < 0.05.