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Table 2 Distribution of person-years in the study of vaccine effectiveness against COVID-19 hospitalization

From: High vaccine effectiveness against severe COVID-19 in the elderly in Finland before and after the emergence of Omicron

 

Not vaccinated, person-years (%)

Vaccinated, person-years (%)

Age in years

70–79

173 830 (24)

535 938 (76)

80–89

57 939 (19)

246 105 (81)

90–115

13 068 (22)

47 634 (78)

Sex

Male

105 628 (23)

350 917 (77)

Female

139 209 (23)

478 761 (77)

Region of residence

Helsinki-Uusimaa

56 435 (22)

202 126 (78)

Åland

1145 (19)

4786 (81)

Northern and Eastern Finland

61 478 (23)

205 852 (77)

Southern Finland

59 279 (23)

197 393 (77)

Western Finland

66 501 (23)

219 521 (77)

In long-term care

No

233 993 (23)

779 369 (77)

Yes

10 844 (18)

50 309 (82)

Influenza vaccination in 2019–2020

No

133 875 (29)

335 681 (71)

Yes

110 963 (18)

493 997 (82)

Nights hospitalized between 2015 and 2019

0

132 975 (24)

429 964 (76)

1–5

50 008 (22)

181 812 (78)

6–20

35 615 (22)

126 826 (78)

21+ 

26 240 (22)

91 077 (78)

Presence of comorbidities or medical therapiesa

No predisposing comorbidities

84 412 (24)

261 428 (76)

Only moderately predisposing comorbidities or medical therapies

65 980 (22)

232 391 (78)

At least one highly predisposing comorbidity or medical therapy

94 445 (22)

335 859 (78)

Presence of particular comorbidities or medical therapiesa

Severe heart disease

93 843 (22)

337 889 (78)

Type 2 diabetes mellitus

52 035 (22)

182 964 (78)

Immunosuppressive medication

35 443 (22)

127 002 (78)

Actively treated cancer

31 410 (22)

114 354 (78)

Severe chronic respiratory disease

26 198 (22)

93 213 (78)

Neurological condition affecting breathing

22 431 (22)

79 939 (78)

Autoimmune disease

17 062 (22)

60 089 (78)

Type 1 diabetes mellitus or adrenal insufficiency

13 627 (23)

46 922 (77)

Sleep apnea

11 867 (21)

43 736 (79)

Severe kidney disease

5548 (22)

19 162 (78)

Psychotic disease

3833 (29)

9282 (71)

Severe chronic liver disease

1165 (25)

3568 (75)

Organ or stem cell transplantation

560 (22)

1962 (78)

Severe disorder of the immune system

398 (23)

1369 (77)

Down syndrome

3 (19)

13 (81)

  1. aSee study of predictors of COVID-19 hospitalization [26] and Additional file 1: Tables S1, S2
  2. This tabulation uses a binary vaccination status without distinguishing between vaccine brands, number of doses and time since vaccination