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Volume 29, Number 6—June 2023
Research

SARS-CoV-2 Vaccine Effectiveness against Omicron Variant in Infection-Naive Population, Australia, 2022

Lauren E. Bloomfield, Sera Ngeh, Gemma Cadby, Kate Hutcheon, and Paul V. EfflerComments to Author 
Author affiliations: The University of Notre Dame Australia, Fremantle, Western Australia, Australia (L.E. Bloomfield); Western Australia Department of Health, East Perth, Western Australia, Australia (L.E. Bloomfield, S. Ngeh, G. Cadby, K. Hutcheon, P.V. Effler)

Main Article

Table 7

Demographic characteristics of matched pairs for analysis for homologous versus heterologous 3-dose schedule SARS-CoV-2 vaccine effectiveness subanalysis, Western Australia, Australia, February 1, 2022–May 31, 2022*

Characteristic Homologous schedule, no. (%) Heterologous schedule, no. (%)
Age group, y
16–19 8,409 (5.4) 0 (0.2)
20–29 33,199 (23.5) 249 (6.8)
30–39 42,223 (29.0) 268 (6.0)
40–49 44,699 (28.4) 291 (2.7)
50–59 17,565 (11.3) 4,449 (16.8)
60–69 1,442 (1.2) 10,897 (38.4)
70–79 370 (0.3) 5,923 (21.0)
>80
1,244 (0.9)
2,109 (8.0)
Sex
F 84,961 (55.8) 11,458 (46.2)
M 63,950 (43.9) 12,706 (53.4)
Unspecified
240 (0.3)
25 (0.5)
Aboriginal Status
Non-Aboriginal 147,475 (98.7) 24,069 (99.2)
Aboriginal
1,676 (1.3)
117 (0.8)
No. comorbidities
0 143,910 (96.6) 19,940 (85.0)
1 1,656 (1.0) 780 (2.7)
2 2,997 (1.9) 2,284 (8.0)
3 153 (0.1) 258 (0.9)
4 337 (0.2) 624 (2.3)
>5
98 (0.1)
300 (1.1)
IRSAD
1 306 (0.3) 31 (0.5)
2 6,641 (4.7) 1,024 (4.7)
3 3,074 (2.1) 561 (2.3)
4 12,710 (8.6) 2,649 (10.7)
5 14,401 (9.4) 2,756 (10.5)
6 14,992 (10.2) 1,846 (8.4)
7 15,669 (10.5) 2,268 (9.5)
8 23,381 (15.4) 2,825 (11.7)
9 30,236 (20.4) 4,827 (20.4)
10 27,741 (18.5) 5,399 (21.4)

*IRSAD, Index of Relative Socioeconomic Advantage and Disadvantage.

Main Article

Page created: April 19, 2023
Page updated: May 17, 2023
Page reviewed: May 17, 2023
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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